vitamins left in rucksack for months

I've been away for 6 months and left 20 tubs of vitamins and minerals in a rucksack zipped up in a bedroom. The expiry date for all are end of 2017 as I only just bought them before leaving. I come back and all of the plastic tubs have brown mold type stains and some have dusty cobweb type stuff on lids.

I put them underneath tap to clean them. The vitamins look fresh and normal it's just the plastic tubs. Are they still good to go?

vitamins left in rucksack for months