@Initm Photo Flo is a surfactant like Triton X-100 which breaks water's surface tension and allows it to get down deep into the grooves instead of riding nearly on top of them. A few drops go a long way. In film photography and printing they call them "wetting agents". +1 on your idea of using a vacuum machine for a quicker drying method after ultrasonic cleaning. I'm sure you know already, but for others who don't, the key is not letting it rotate too many times, after it is dry, under the wand such that the record builds up a static charge and attracts dust.
Ultrasonic cleaning
How many of you are ultrasonic cleaning your records and what solution are you using? I have a Kirmuss ultrasonic machine and I am currently using Tergikleen solution with distilled water. Have some Audio Intelligence ultrasonic solution on order to try. I can tell a big difference with noisy records lowering the noise floor.