Anyone ever fix or had replaced the on off switch on this meter? I opened mine up and isolated the problem to the switch, I've applied two different contact cleaners multiple times to no effect. If i fiddle with it it will come on, on - off many times, pull the battery, put it back in etc, once it even came on after I gave up and set it down. I'm wondering what the cost would be to replace the switch. I like this meter a lot and hate to give up on it.