You don't have to get the pads or rotors wet to bed them in properly. Just apply one set of brakes and ride as hard as you can for 50 meters. Repeat with the other set. Then you are done.
You don't have to use a torch to clean the pads. A bit of sandpaper will work (if indeed you need anything at all, which you probably don't). Unless you got brake fluid on the pads, they are probably fine.
Clean the rotors with isopropanol or ethanol and a paper towel.
Brakes do make noise in rainy conditions sometimes.