vent adjustment

I've been looking for the answer for this, but must not be putting in the right search terms. I've got vents that are really hard to open and close on the bottom of my Bullet. What should I use to unstick 'em? Thanks!

I first want to thank everybody that contributes to the TVWBB forums especially the Mini WSM subforum. The information shared here is invaluable and has helped me immensely in the success of my cooks. I wanted to ask at what temp does your Mini WSM prefer to settle at or what is a range that...