Just beware that if you use hot glue for everything (as I do) the rule of hot glue is that it is permanent on things you don't want it on, and eventually falls off things you never want asunder.
In any case, junglesmacks is right about washing circuit boards. I would gently hand-wash them in a sink, make sure all the soap and now-corrosive playa dust is rinsed out completely, and dry them as quickly as possible without using a tumble dryer. If there's even the slightest possibility of dampness or trapped water in the circuits, don't apply power.
Circuit boards are actually washed with soap and water as part of the manufacturing process.