The last time I was in a local store to pick up the Tech Wash and Nick Wax, the clerk pointed out that most people don't put their garment in the dryer. He said that is the most important part as the heat bonds the Nick Wax. I've only dried my suit once, but I'll have to try it again. I have the 2-piece Roadcrafter.
Oh, to get out the grunge, I use a nail brush after smearing straight Tech Wash on the soiled spots, then a sponge, then more nail brush. With patience I've been able to get my cuffs, especially, almost clean again (they're Hi Viz yellow). Then I put the garment, without rinsing, into the washer.