ALSO
if you made power modifications, it is possible that it is going OVER in power when you make complete and full contact with the switching.
knowing how those switches work, they can have reduced current traveleing through them when they are pressed lightly or not making complete contact.
Usually this occurs when the power going through the switch is higher, these things dont really have that MUCH power going through them, but it is another concideration, and possibility. (you got it cranked up to high)