Our rat trap caught a rat outside the size of a standard cordless phone. This morning, before I went to work I popped the hood to check for rodent droppings again. Nothing!

so it's safe to say the garage is okay for now... We setted up a trap inside the garage last night too, but got nothing this morning... Which should be a good sign.
It's nice out today so I will be checking the intake filter and pressure washing the engine bay.
Does anyone know if it's safe to use car wash soap in there?