Puddles in those grooves -[ HMM ]-

Drops of record cleaner fluid on a 45-rpm record. The record is on a record-cleaning machine consisting of a turntable driven at slow speed, a spindle with a threaded clamping knob to hold the record snugly in place, and a built-in vacuum to suck up the fluid and debris.

 

The fluid is applied with a squirt bottle, a fine-haired brush is used to distribute the fluid and scrub the record for ten revolutions of the record in reverse, then forward, then the record is vacuumed clean and dry.

Done