It makes a blue "jelly" at the bottom of the sprayer (Actually I think it floats on the top and sprays out when nothing else is left) I've wondered what the heck is going on too? Since the combination of products is recommended on the label. I think I remember trying an anti foam and don't think it helped. Might try it again to make sure.
so Reliant:Water is 50:50 then you add pentrabark?
I just made up another batch yesterday and had no problems... We were doing a bunch of trees...I think I mixed 8 Qt Reliant, 5 gallons water and 16 oz Pentrabark (I'm being too lazy to go look that up...but pretty sure that is what we used).
Yeah I typically get build up at the nozzle tip; with and without the mesh screen just before the opening. Slightly easier to deal with when taking the mesh filter out as it’s hard to clean while just the tip (heh) I just put a thin wire through to push out any build up.