Reub, you may be familiar with L'Art du Son, but if not I would certainly recommend you give it a try on your "Spike". I have had nothing but excellent, and in some cases, amazing results with it. I desperately tried to find a decent Bob Seger "Stranger in Town" and ended up with three bad copies which all "looked" fairly good but I was ready to trash them until I discovered L'Art du Son. One is now an 8.5 out of 10.
Used correctly it may fix your "Spike".
One thing I firmly believe is that you cannot always clean a 20/30 year old record in five minutes. Like the bugs on the front of your car, left too long, they harden and need to be soaked before you can wash them off. I often soak my records between two sheets of cling wrap for up to an hour to soften that old grime before washing with LArt du Son...maybe worth a try on Spike...
and, on my Michell Orbe tonight I have Boz Scaggs and Sade...both as clean as a whistle...!