You could try tea tree oil in the wash and on the skin. Just make sure you dilute it first as it's more potent than people sometimes think. For the wash you could mix it with water in a spray bottle and soak the socks overnight.

You can buy a 'canestan hygiene laundry rinse' on supermarket shelves here in Australia.

I'm not sure that bleach kills anything too much.

I don't know about 'tide with bleach' but others from the US may have some idea.