gls1114, hello! Leaving it in while sleeping and moving around CAN be done but is by no means mandatory. I left the dilator in while sleeping a few times early after I’d gotten the botox, but I wasn’t able to do it sustainably – I sleep on my stomach which is an impossible angle for the dilator and I couldn’t stand getting terrible sleep, so I stopped doing it but was still able to achieve penetration before too long. Doing it for super long periods isn’t as important as dilating consistently (every day) and getting good at inserting, wiggling, and removing the dilator. If it’s not comfortable for you to sleep in it, don’t force it! As for helping it to stay in, you’ll want to insert the dilator, then put on a tight pair of underwear to keep the dilator from falling out.