Odd seeing you guys having problems with the spraymaster bottles. I wonder if their quality has gone down hill since I bought mine? I have had mine now for about 2.5 years, one with Megs Wheel Brightener, one with Purple Power degreaser, and another with APC and I have never rinsed the sprayers at all after using them, they have been like that the whole time and I have no leaks and no issues at all.
I will try my luck with them again, but if they fail to impress me like they originally did then I will go with the AZ bottles you guys are talking about.