Options for ridding records of static electricity

Exactly. It seem that some people have more trouble than others and we may be able to pick up on certain factors that are more important.
It is funny, in analysing the situation I looked up the conductivity of boron. It is not. I was thinking that a conductive cantilever like aluminum might actually lead electrons down to the record. But the opposite is also true
Once the charge gets high enough on the record it will start discharging to whatever is closest and conductive. Lewm for certain knows this. When us ESL guys get the bias voltage too high you hear snapping as the diaphragms arc to the grids. Fortunately this does not hurt modern ESLs at all. 
The baseline condition is the hardest variable to account for because in the absence of a path to ground static charges can last indefinitely. Indeed it is possible for the effect to be additive until it becomes obvious. 
I think the vinyl is not as important a factor. The anti static vinyls of the 60's were essentially marketing. My dad's old Rec O Kut/ESL/Empire table created static like crazy and it did it to all the records. He had a large classical collection full of London's, RCA's and Columbia's. The treatment back then was to wipe the record with a damp cloth. They had "anti Static" felt cloths impregnated with something which felt like an oil but they were messy and got contaminated fast. Once you washed the any anti static effect they had was lost. That was about it for record cleaning back then. All records are at least 98% vinyl and I really do not think there is much difference between them as far as static is concerned. Also, people do not only play one type of vinyl so I think any effect would average out.
so,  I think we can boil it down to Location (weather),seasonality, The severity of the problem, Turntable, cartridge and arm, type of mat, Anti static methods used, How do you store your records. How would you rate your static problem. 
This is just to give us an idea where to look. Further work will have to be down to nail the causes down. 
Like you I think humidity is going to be a big determinant and I do plan on rerunning my experiment next winter. But humidity is not the only factor it is just a coenzyme if you will. The electrons are coming from somewhere along one of maybe multiple paths. 
Why solve the problem? Static electricity is great for business. Record don't get dirty because people throw them in the dirt. 

I have been reading this post with great interest, because I too was plagued by static. The issue became apparent when I upgraded my Nottingham Ace Space to the heavy platter configuration which is a heavier and thicker platter which sits on top of the original platter.  In the heavy configuration, the thin foam mat which sat atop the original platter is discarded and the vinyl is placed directly on the platter.  Nottingham makes a big deal about no other interface between platter and vinyl using the heavy set up.  Shortly after this I upgraded my cartridge from a Kisecki Purple Heart to a Van den Hul Crimson -well worth it.  At this point I started noticing notable "static cling" to the platter when removing an lp.  I was certain that there was some friction between the two platter infaces as the source of the static cling. A unusual property of the Nottingham tables is that there is no on/off switch.  The motor is constantly running, but is low torque so the platter doesn't move until it is started and stopped by hand.  I had used a Furutech de stat II for years prior and even it wouldn't completely eliminate the static after play.  FWIW, I ultrasonically clean all records and house them in MoFi sleeves.  I use the audioquest brush before and after each play.  I proved to myself that it wasn't an inter platter friction issue by starting, running the turntable without the stylus engaged, and stopping the turntable several times over a 40 minute period before removing the record.  My highly advanced "arm hair detector" was used to measure the static.  There was none.  I only had significant static develop after play, and generally only after the second side of an lp.  Prior to flipping the record, the de stat and carbon brush was used on the most recently played side, then repeated on the flip side right before needle drop.  So mijostyn, you may want to try playing both sides and then checking for static.  I contacted Nottingham and they asked me to place a ground wire between the lower bearing and a wall ground.  Made no difference. At this point I was quite frustrated because the static when removing the lp was quite audible.  I wondered If all the time spent cleaning the vinyl was worthless.  I purchased an achromat and placed it on the heavy platter, adjusted VTA and the problem is 95% gone.  Only slight hair waver on occasion.  Not sure if this helps at all, but it was my experience.

I don’t mean to be rude, being new here and all, but wow you sure are an argumentative bunch! 
@masi61  I would recommend that you test some things out for yourself... it seems you have several options from some very helpful posts. I again would recommend the Milty. Why? First off it is a trades tool that is proven to eliminate static. It’s not witch craft or snake oil designed to part record collectors from their cash. Buy one and if it doesn’t do what it’s designed for then it’s defective and you should return for another. Try a trades store, I bought mine from Screwfix in the UK but there will be equivalents worldwide I’m sure.  Ok back to records... For those records seemingly welded to the inner sleeve with static, the milty offers a very quick and effective method to reduce the static. You can test the effectiveness of the tool, and the method I suggested, by statically charging a balloon or some old damaged record before holding close to a teaspoon of ground pepper and salt. Watch it lift those grains. Now fire the milty at your chosen statically charged item... watch those grains fall. There are variations on the experiment, have some fun. Now I’m not saying that the record won’t gather static again over time (I haven’t witnessed it) but I am saying it’s sufficiently discharged for an uninterrupted playing session. This is my advice and based purely on personal experience. Finally welcome back to the wonderful world of records! Peace. J-Ro

@ masi61,

are you sure its static? I would venture to guess you have not cleaned all the crud out of the grooves. Doing so will really lower the noise floor.

jro1903, yes the Zerostat works but the trick is eliminating static formation
period. Any time your record develops a static charge it is drawing in dust and pollution like a magnet. 
Interesting orthomed. Isolating the record from the platter stopped the static formation. Can you fine out what the platter is made of? Both cartridges use a non conductive boron cantilever. I do not think the Achromat is discharging the record. I think it is isolating it from the platter. If the material the platter is made from is high in the triboelectric series that would explain your problem. 
Most of my records are in rice paper sleeves but I still find an occasional one in paper. Last night I pulled out Dylan's Nashville Skyline. I have not played it for several years. Sure enough it had a pretty decent charge on it. All my records are discharged during play. They always go back in the sleeve in neutral condition but this one developed a charge over two years just sitting in my collection!! My records are stored in a special compartmentalized record cabinet. They are packed in so there is always some compression but not so tight that they are hard to remove. This Keeps the records flat. I know that putting a record into a sleeve then pulling it out at a humidity of 54% does not create a measurable static charge. This would leave me to believe that under pressure for a prolonged period of time paper will transfer electrons to PVC without rubbing. 
The conclusion is there are multiple ways records collect static leading to multiple solutions. The first is put all your records in anti static sleeves. Sleeves that will not transfer electrons to vinyl. I just ordered another 50 from Sleeve City to get the stragglers.