Moldy weed. Help!

my friend just harvested all his plants a few weeks ago and dried them out for a week or so then put them all in air tight jars to cure.
the buds were still a little moist when he put them in the jars to cure.
he looked at them today to find mold on some of the buds at the bottom of the jars.
is there a way to eliminate most of the mold?
i read to leave buds out to dry for a few hours then to throw the buds in the freezer for an hour or so, then leave buds out a few more hours.
would this work?