I had a Preener, Dust Bug, Humidistat, Parastat, RWB (record wash brush, all the preceding are from Cecil Watts), Diskwasher, the whole load of popular and inexpensive cleaners back in the 70s. But I never handled my LPs touching the grooves. The problem with some of my old albums were parties where sticky drinks got sloshed on them, someone pulled the arm across an album or things like that.
Today I use a VPI 16.5 and AIVS (just bought a two year stock) cleaning fluids. These have resurrected some LPs that I thought were hopeless.