I just hold the brush in place with some pressure, but no way to measure pressure. In addition, before this washing step I use an ordinary Audioquest carbon fiber dust remover brush simply held in place, twice or three times, for two or three rotations each time, on an ordinary turntable since this seems to eliminate a lot of particulate matter which can make the VPI suction device accidentally rub abrasively against the record. This extra effort is for old records from library sales, thrift stores, tag sales, etc. which can benefit from multi-step process. There are many record cleaning solutions available apart from the one included with your unit. I'll let others recommend, and you can check archived discussions.
