I moved into a 5 yo double wide a year ago and I have noticed that several light switches, the rocker kind, crackle if not moved quickly. Is this something with the rocker type switches, I've never had any before, or is this a "I need to get an electrician" problem? If this is common with rocker switches I can change the switches myself but if it is bad wiring I know I will need an electrician. Just wanted to ask before I fork out lots of money.