Deodorant works by killing stink-causing bacteria on your skin and preventing body odor. ... Dry your skin completely: Antiperspirants and deodorants should be applied to completely dry skin because wetness can make the formula less effective.

Does putting on more deodorant help?

You're applying deodorant or antiperspirant on wet skin

That means putting on antiperspirant while you're already sweating or right out of the shower won't do much to stop your sweat. And constant trips to the bathroom to slather on more deodorant won't help, either.

Is it bad to keep applying deodorant?

Many modern deodorants are effective for between 24 and 72 hours, so you shouldn't have to apply them several times a day. However, a more regular application can help your confidence and will leave you feeling fresh and clean.