Mine was doing the same thing. If you pull it into a garage where you can watch when the brake light activate, mine was sticking on on the front brake switch. That switch is on the bottom of the instrument cluster, right side obviously and it's held in by a single phillips head screw. Get some contact cleaner as Ray suggested and once removed, you'll see a spring on one end. I shot the contact cleaner in there and it seemed to resolve my issue. Until of course, it gets gummed up again. Cover your tank!! You don't want that contact cleaner on painted parts or at least I wouldn't want to risk it.
Good to know and thanks for the info. I'll give it a try this weekend.