If the whole dirt in the window thing was true he should of disclosed that to you prior to doing the work. Similar to how most shops will let you know if you ever have tint removed from the rear window that sometimes the defroster will mess up.

I had my tint done a few years back. I didn't notice till a few days later that the tint was cut a bit short on my driver side window. I went back let the owner know I wanted it redone and he had no issues. I later on recommended a few friends to him.