ryobi p215k1 drill driver forward/reverse switch is stuck and won't move, how do i free it up?

It's probably jammed with fine dust or debris from drilling. Don't force it, as you could break the internal mechanism.

Here's how to clean it safely:

1. Remove the battery from the drill.
2. Use a can of compressed air (like for cleaning electronics) and blast air directly into the seam around the forward/reverse switch. Move the switch back and forth slightly as you spray to help dislodge particles.
3. If it's still sticky, apply a very small amount of electrical contact cleaner or isopropyl alcohol around the switch's base. Avoid using WD-40 or other lubricants that attract more dust.
4. Work the switch gently from side to side several times to distribute the cleaner and loosen the grit.
5. Wipe away any excess cleaner and let it dry fully for a few minutes before reinstalling the battery.

IF THAT DIDN'T WORK: The switch mechanism inside the housing may be physically damaged. If cleaning doesn't restore smooth operation, the drill will require service. The switch is a covered component under the 3-year warranty for defects.

HEADS UP: To prevent this, regularly clean your tools after use, especially when working with drywall, masonry, or wood. A quick blow with compressed air around the switch and trigger goes a long way.