I know some of the Pros of this site will frown on this reply,,BUT it works.
Do not spend $20.00 a gal on a sticker!!!!!
Buy the cheapest dishwashing liquid you can find and mix at approx 2 oz per gal. try this, it really does work.
All stickers help reduce service tension and softens the outer coating of plant tisue, using it will give better results, but don't expect good results if it rains witin 4 to 12 hrs. depends on the plant.