Just my .02
Adder's right those cheap .45 cent ones do clog easy. If I were you I'd buy some good heli misters, There more expensive ($1.75ea USD) but they never get clogged.
Ive also seen that GH aero 20 in action. With no misters and the water just squirting against the sides, It sounds like somebodys squirtin the side of your house with a high pressure hose, Its really loud.
Aerobuds 