At first didn't set dispenser dial right cuz it's marking is small on bottle, missed it and mistakenly lined up numbers with nozzle (2 tsp/gal so took long time to empty bottle while spraying yard).  Next time I went to use it the fertilizer didn't come out of the bottle at all.  I then read the manual and found out you should clean (run clean water through, no fertilizer) after each use.  Sure enough some fertilizer got stuck in sprayer part, used safety pin to clear hole in sprayer assembly, cleaned with water and set dial properly (at max, 10tsp/gal for powder to liquid mix, line up with little dot on side of sprayer right beneath dial) and has worked like a charm since.  Good product and instructions, read em first (;