To me, it sounds like the other person is the driver and OP is the passenger. The driver claims she has a good driving record, so OP continues to let her drive even though he doubts her driving ability. He also thinks if he just stays quiet about her swerving all over the road that some how his...
I don't know if you're using a prescription shampoo, so if it is disregard this suggestion. If not, then try Nizoral. I used to use it when it was a prescription medicine, but now it's OTC. It smells nice and worked well on my scalp.