Do you know how to use the Xerostat? If you are not using it correctly, it won't work at all. There are detailed descriptions of its proper use in these archives or on Vinyl Asylum, or elsewhere on the internet. It would be a good idea to read those, even if you think you know what you are doing.
Also, as others have hinted, a lot of static is created by "us", based on what we are wearing on our feet, how we approach the turntable over what kind of floor covering, etc. By that mechanism, even using the Xerostat correctly does not cure the problem, because the work of the Xerostat is undone by wool carpets, leather-soled shoes, touching the wrong thing, all in the process of changing or removing an LP from the platter. But, I have to say, static charge that has the force to pull your tonearm presumably off its rest and onto/into the platter surface is something I have never seen or heard of before. I am guessing you own one of those early TD124s with the iron platter. (In which case, the attraction between the magnet assembly in your cartridge and the iron platter may be at least part of your problem.)
Also, as others have hinted, a lot of static is created by "us", based on what we are wearing on our feet, how we approach the turntable over what kind of floor covering, etc. By that mechanism, even using the Xerostat correctly does not cure the problem, because the work of the Xerostat is undone by wool carpets, leather-soled shoes, touching the wrong thing, all in the process of changing or removing an LP from the platter. But, I have to say, static charge that has the force to pull your tonearm presumably off its rest and onto/into the platter surface is something I have never seen or heard of before. I am guessing you own one of those early TD124s with the iron platter. (In which case, the attraction between the magnet assembly in your cartridge and the iron platter may be at least part of your problem.)