I just got my used TT up and running, and am aghast at how filthy some of my records are! I have a record cleaner which is a piece of plastic covered with some sort of microfiber pad (a strip about 5 mm wide by 6 cm long.) You put a special liquid (looks and smells like water) on the record, then rub it around in the direction of the grooves.
The little pad is coming away grey in colour!
And here I though keeping my records in sleeves, inside album covers, and behind a closed door in a cabinet was enough to do the trick!
Mind you, I have pets which are dust and dirt factories! Not to mention the hair...there's a good reason the nick-name for the breed is the German Shedding Dog!
Any suggestions, in addition to washing the records in the sink will be welcome. I have always looked after my albums pretty well, but some have greasy fingermarks as well as dust and dog hair! And if you want to find out how sensitive your needle is, just have it run into a hair on the record surface...

The TT came with a little brush that fits on the front of the tonearm. How effective will that be in removing dust and dirt?