Is it beneficial to sleep without a shirt at night if i have back acne?

also what other things can i do to get rid of my back acne

i hav p.e. at school and i bring my gym shirt home every week to wash it but should i do it mor often? is that what is causing it?
Update: well its weight training class and i barely sweat if at all in that class cuz we dont hav that much time to actually workout

its not lik my shirt is soaking wet wen i put it on it is dry but i was jus thinkin if that had anything to do with it
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