Edit: I would also suggest the Hudson HiFi Sleeves
LOL, affordable or automatic?
The Record Doctor are apparently good, and affordable, but somewhat manual. automatic raises the price ... Also have good innersleeves for them when they are clean
smell really moldy
This is not good. Is there any actual mold or mildew on the covers, or do they just smell old?
Because mold spreads...
what (most) everyone else does is put the records in sleeves like https://www.amazon.com/Archival-Quality-Sleeves-Bundle-Protection/dp/B08GL2TQ72?ref_=ast_sto_dp
If you dont want to buy sleeves, just buy more records so there is no room to be slightly open...
a paperclip will crease and damage the cover