Face sweating and t shirts

I just went shopping and didn't realise how badly I was sweating until i looked in the mirror in the fitting rooms. What do people use to stop sweating on their face in high heat?

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Also the amount of times I have to wash my t shirts due to that old deodorant underarm smell is ridiculous because they end up looking dusty as hell from loosibg their colour. What do people do regarding t shirt rotations?🫠