If you're trying to avoid washing your hair, there are a few things you can do to help get rid of any unwanted smells. First, try dry shampooing your hair. This will help absorb any excess oils and odors. If you don't have dry shampoo, you can also try sprinkling some baking soda on your scalp and massaging it in. Let it sit for a few minutes before brushing it out. Another option is to rinse your hair with diluted apple cider vinegar. Just mix 1 part vinegar with 2 parts water and pour it over your hair. Rinse it out with cool water after a few minutes. You can also try using an essential oil like lavender or peppermint to help freshen up your hair between washes. Just add a few drops to your regular conditioner and use it as normal.