Zero liquids!
All my holey gym socks get a "sanitize" wash setting and drying on high- twice on the dry cycle. The all cotton fabric is then clean, very clean.
Then I just wipe everything down. Women buy Q-Tips that are pointy to do their makeup. Don't tell my wife some of her's are missing. Those will reach into the crevice of the agate bearings to clean them.
Buy a can of compressed air used to blow out computers and give everything a good final shot. Reassemble.
My 505 has been bullet proof for 40+ years. I took it into the desert south of Boise for many years (my long range target range back then) and getting there was a paint shaker ride. In that time I learned something about repeatability. I took a check weight measured on my bench set about the same as the powder charge I was working with. The scale foot levels the balance beam pointer to pan but not side to side. If the scale is not level side to side (the desert looks flat, its just not level) the asymmetric load on the knife bearings will cause fluctuating readings. That's why my scale rides on a three legged platform with line levels glued @ a right angle to each other for leveling it.
About two years ago during another cleaning I took my torpedo level out and checked the beam, it was riding pointer high. Zeroed yes but not level. I checked to see if the pointer moved the same + or - 0.1 gr and discovered that + moved the pointer more than -. After leveling the beam by removing a tiny amount of counter balance weight the differential weight readings were symmetric.
Boomtube is spot on about the electronic scales. You check them against a known weight EVERY TIME! My son's seems to prefer a level surface for repeatability. But every now and the in the same weighing session it indicates a whopper.
So we check it with the 40 year old Ohaus.