What do you think about me washing my work clothes less often in the winter because I feel like I'm sweating less?
What are you trying to do when you wash your clothes?
I'm trying to get rid of the sweat smell, I don't like to smell.
If they don't smell bad, then there's no real reason to wash your clothes. As long as you are clean, I don't think there's any harm in washing clothes less frequently.
I know that but I don't want to take any chances.
Well if you care about your hygiene enough to want to continue washing them frequently, then you should. It's never a bad thing, and honestly quite important, to take care of your hygiene however you can.