I'm a tipper, but I realize not everyone thinks the same. I just tipped a mobile auto mechanic who came out and spent 3 hours working on a Sunday afternoon working on my truck $100.00 dollars. I tip my painters depending on how big a job they are doing. My carpet cleaner and Hvac guys always gets a twenty each. Don't use window cleaners, so I do not know about them. Tip my house cleaners prior to Christmas, and have bought them gifts also. Have never tipped a plumber. Should I have tipped them too?