I manually scrub the living crap out of my old and/or new LP’s, using a manual system, 10 at a time, soft infant scalp brush, no damage at all. Amazing how a beat up LP can sound.
see 11th photo in my virtual system here, I listen while cleaning a batch of 10.
https://www.audiogon.com/systems/9511
My friend has a nice Ultrasonic cleaner, easy, fairly quick one at a time, easy to get a few ready before hand. However, sometimes he/we hear noise on his ultra cleaned LPs.