Can you still use a lib balm if it goes through the washer?

I suggest you do NOT. The water & detergent could have seeped in through the cap and now it contains chemicals & even if you can't smell or taste it, it's there. If you use it, (hey, I can't stop you) your lips might have a minor irritation or swelling, itchy-ness, & mainly unsightly redness & dryness.