[divxrippimp]

Open the back, and where the stylus goes in there should be a small hole with a rubber plug, if the rubber piece is gone you will just have to use tape...

Just take a single 1"-1.25" long piece of scotch tape and cut it down the center so its half as wide, then wrap that around the base of the pen 1/4" above the black tip, that should fix it... as for getting another rubber plug, i never looked...