I've done a little reading up on the Mia and found that many people were having problems with the cap falling off during use. Since Mia is not waterproof, I wanted to know if this was a defect or is this is something that happens to the Mias over time. I am looking to get one for my girlfriend, but wanted to know more about this problem before I purchase it. Also, I read that LELO has made improvements to Mias motor. Is that the only improvement that was made? Or does anyone have the same problem with the cap falling off on the new Mia?