Ear tip worn out and got a new one? Here's how it goes off/on!
Leitner made it easy to get the eartip off and replace it with a new one. Simply grab the eartip itself and rotate to the left (remember, it's right-tighty; lefty-loosey) while you are gently pulling out. It should pop out quickly!
To put on a new one, line it up so that it can go into the slot, then rotate to the right.
Note: Your eartips may look slightly different than these ones.