This problem I have is pretty random. I usually keep my car AC temperature around 75 degrees when it's hot out. When it's cold out sometimes I don't bother to turn it on at all. I always turn off my AC before getting out of the car. Sometimes when I get back in my car and turn on the AC the temperature will be set to 60 instead of wherever I last had it set. Does this happen to anyone else? I was trying to search the forum but I didn't find anything. I'd like to know what I should do besides just saying I need to take it in since I don't think my car is under warranty anymore. I don't really feel like wanting to pay for this problem to get fixed. I can live with it, but it's just annoying and if there's an easy fix that I can do myself then I would try to tackle it.

EDIT:

Forgot to mention my car is an 07 G35 sedan.