Mijo, We've been over this ground before. Dust covers, used while the LP is in play, are very bad for SQ, and it's not comical to think so. You apparently do not hear a problem, which is fine. Most others do, as was suggested by the responses you got last time you aired your preferences, including my own response. Dust covers are harmless only when the turntable is sitting idle. I and most others find that styli accumulate "gunk" (dust and probably tiny fragments of vinyl plus whatever was on the LP beforehand) during play, dust cover or no. Cleaning the stylus at least periodically if not after every LP is a worthwhile exercise therefore, in my opinion. Also, since I purchased my Xerostat in the mid-70s (probably 1972) in the UK, I have some direct evidence that the obsession with record cleaning goes way back before the 1980s. I think you'd find that the Discwasher products are also "ancient". A friend of mine in college in the 1960s, had one of those brushes that ride on the LP ahead of the tonearm, of the kind you like. The only part of your post with which I can agree is the notion that it is a good idea to avoid or eliminate static charge on the LP surface, so much as that is possible.