I use a spin clean as a pre cleaning step to remove loose surface debris, then into the US tank for 15min at .33 rpm...or 5 revolutions. Then rinse in distilled water, and nitty gritty vac dry.
My results are OUTSTANDING. I now have numerous 55-65yr old LPs that have a noise floor lower than that of my system. I hear better transient response, and staggeringly improved resolution of small scale details- air space around musicians etc.
I highly recommend US cleaning to any serious record collector.