The DIY versions have a large tank where the record is immersed and revolves around a central axis via a motor drive, the record is the manually removed for drying either on a rack or some offer a drying tank which has an air dryer.
The commercial machines have a small tank which automatically fills as part of the cycle, after cleaning the tank automatically empties and a blow dryer is activated, I believe the commercial machines have a filter to clean the crap that has been removed