^ yeah, experience is best. some strains need higher ppm's and the purity of the solution also comes into play. really clean jar and silver is a major facet. the goof off is really good at getting stuff very clean. fingers need to be kept clean when handling the silver as you can have cleaned the jar and silver really well but if the fingers aren't squeaky clean (fouled from the silver you just cleaned) the silver gets fouled again when putting it back on the clips to immerse for the next go.Okay, My friend Toker 69 used 60 on a regular basis as he discovered his 40 ppm was taking up to 40 days before sacks produced pollen. He switched to the 60 ppm and had sacks in 14 days and produced pollen by day 21-28. He had mentioned the pollen you speak of; as it is clumpy. he kept spraying until the pollen was really fine and falling out all over. He was working with Auto's at the time.
goof off is essential imo. iso alcohol doesn't even come close to goof off. I get my bong very clean in under 3 minutes using goof off. the bowl takes a little longer, but still very quick. I clean my cs jar in under 3 minutes with goof off. the silver takes a while longer; I use a wire brush and resoak one time after the first go and the silver is clean after a few wire brush stokes for the second go..
getting cs past 20 ppm's and still having a clear cs solution ( not cloudy, dark looking) can be very difficult; at least it was for me until I learned the trick I posted earlier about leaving the silver in the cs solution for a couple of days after unplugging the cs unit.