Hey guys I just washed my car today and i encountered some problems that really bothered me and i hope you guys can help me out

1. I just got a bottle of p21s gel wheel cleaner 500ml, and after i put on the sprayer, i couldn't get anything to spray out -_- is there a specific thing you have to do to the sprayer?
2. After i shampooed and rinsed the car, there were a bunch of bugs hopping on my car. Does this happen to anyone else? what do u do to deal with this? I am using mothers gold car wash atm.
3. How do you guys take care of the mf towels after you use them? I only use a low amount of towels when washing car so I don't really use the washer/dryer. I just rinse the towels after car wash and hang dry.
Sorry for asking so many questions, but thanks for the help in advance!!!