[DonRotolo]

Just keep in mind that electronics are generally made to be rinsed to remove solder flux after wave soldering. So, water on the board as Alan and Al have suggested are your best bet and generally will not harm things. (A notable exception is a paper speaker, as might be found in a cell phone, but that doesn't apply here).

So, do what they say and just leave it to dry (nothing fancy, air dry a few days or oven dry a while), and you should be fine. (For the ones that didn't melt, of course)