My advice, get a pair of scissors. Sounds a little strange I know, but they have special "electricians" scissors you can get at any electrical supply house, or even in the LVW section of Home Depot.
we call them "snips"
real phone men wear them in a pouch everywhere , (never know when you might need them )
one thing to try on the buttset is to wiggle the cord at the clips and where it goes into the case to see if that effects the static
(I'm assuming you replaced the battery )
