Hi Woow,
First you have check if there is any water left on the bag,is this the case don't do anything, it will be ok, if this is not the case:
Just poor some water on the bottom in the bag,
not directly on the kit, but along the bag, on the side that has no filter.Just 3mm or something like that.
Do not let the bag ventilate, because there is a big change that your kit get's contamined and then it's useless,
Best regards,
Sjamania