Although bras don't necessarily fall in the \"wash after every use\" category, like undies and socks, they do require more maintenance than they might be currently getting. Note, however, this does not mean a bra should be washed every three days. Wouldn't it be easier to just wear one for three days straight, then switch to the next bra? \"Bra maintenance is important because you need a bra in good condition to help keep your breasts perky,\" says breast health author Christine Egan in an email interview. But, however you wash, never put your bra in the dryer, say the experts.