While removable, you must be careful to keep them in place for as long as possible in order to keep your treatment schedule on track. They need to come out while you eat, so they do not become damaged or warped. You should also remove them when drinking anything hot since that can also warp them. However, as soon as you are done eating and brushing your teeth, the aligners need to be replaced.nnIn our Mission Viejo, CA dental office, we recommend that you put your aligners in a special container we provide, so they are not accidentally thrown away. Too many people have put their aligners in napkins, only to find that they are gone after lunch. Replacing them quickly is important, so be sure to keep their case with you instead of taking them out at home and waiting until you come back to replace them. This will help you to stick with the 22 hours a day requirement and keep your straightening plan on schedule. Doing so will take your teeth from crooked to straight in a short period of time.