Save reciever from water?

[Stoomstrijkijze]

How long can I wait with the rinse? I pretty late now and everybody is sleeping so I can't start searching for it. I even don't know if we have it in our home.
I'm scared for corrosion on the pcb so I wanted to rinse it with alcohol (evaporates quickly) but I read on the internet that receiver are very sensitive for rinsing with water/alcohol.

It have it now in an airsealed box with rice in it to get all the water out of it. I guess I'll try my car with 30% epa or so next time :/ I don't wanna crash it again :x