Im so sick of these things not working like they should. The ones that you get for samples are a joke!. i think Im getting carpel tunnel off some of them. i have poorboys spray and wipe qd that has a great pump sprayer and couldnt work better. It seems like its solid and well made. then i ordered the wheel cleaner that has the same size and type of sprayer (different color) and it works great but you cant turn it off! I accidentally got some wheel cleaner on my seat! And i like PB's products. Pinnacle's xmt is another bad one. It gives your hand a workout. There are some good ones (I dont have a problem with optimums sprayers, but there are more bad ones. Im not just talking about detailing products, but anything you buy in a pump sprayer bottle