Dear Sean,
I've used the nitty gritty. Wet washing completely removes the Gruv Glide product, which is a good thing. It shows it does not 'attack' or alter the structure of the vinyl. That was my big beef with L.A.S.T. (also good stuff). Once the LAST was on, it was on for good. If you didn't like what it did to your record you were out of luck. All of us in our record/music club (informal bunch of guys who love records)
stick with Gruv Glide because it works the best, and is a phenomenal value. Hope this helps.