How to remove pit stains from your shirts?

speed stick gel is gross, you put it on and you feel nasty already. Get the pressure washer out and hang your shirt on a wall and blast your pit stains with it. It gets the crust out. I got a few red shirts that are a little stiff under there too. I like that crystal stuff. My wife is a huge vinegar/baking soda/coconut oil fan says these work for everything....