In my experience with the VPI 16.5 washing machine, my replies are exactly the same as brianmch above.
I also find that a wee bit of fluid is left in the tube, which is then totally sucked in by switching on the vacuum when the tube is swiveled away from the LP.
One extra bit of attention which one could do: take out the tube and blot the lips with a paper towel. That is extra. I do not do it because the lips always seem to be clean with the extra bit of sucking mentioned above.
My 16.5 allows me to clean my LPs so they leave NO residue on the stylus upon playing after washing. I cannot imagine any sort of "cleaner" condition, and am now surprised about the amount of debris I tolerated with my previous manual methods. I use the VPI fluid with optional alcohol added at home according to VPI instructions.
Am very happy with my VPI washing setup
Am also about to try the domestic formula used by esteemed VE member alec124c41:
1 cup Isopropyl alcohol
4 cups Distilled Water
8 drops dishwashing detergent ( or less, to taste)
Rinse with Distilled Water.