Bleach.....I think Home Depot sells a Bleach that is less diluted for
germicide cleaning.
However, you should let the bleach/scurbing set in for at least a day and
air out....then I'd treat it again
and let it dry completely.....this could also depend on where you
live...humidity....use a fan blowing across the floor to help dry it.
Make sure there is a good seal/vapor barrier before putting anything
covering back

Terry