In cold weather I often use a presoak that is made for touch free IBA use. It has more alkalinity than SS presoaks and does a better job cleaning. I will also use a self serve presoak throughout the year but usually stronger than intended. I think I'm currently using purple presoak 3XC by quest with a purple hydrominder tip. It does a decent job. I tell my regulars that presoak followed by rinse will clean better than
soap but many go through all the steps anyway.
I must admit that I have limited experience with powder but I didn't see a significant difference in cleaning. Surely not enough to make it worthwhile to fool with it. I have tried the simoniz correct brew before, as well as powders from Arcadian and Warsaw. This was probably over twenty years ago though.