WE have 2 good mech. in our building. Sometimes 1 of them can get pissy. He got on me because...get this I was using toooooo much wiper fluid. The nozzel on the windshield was not working right so it took more to get the job done. He said they only had a limited supply. In my area you can buy wiper fluid for about a $1 a gallon. This was during peak with lots of ice and getting sprayed by other vehicles.