how long do I leave it on?
1768036
I leave mine on for at least one hour. You can leave it on longer if you like, but some people complain of it causing sensitivity (ie; teeth "tender" to cold liquids etc. I have a friend who leaves it on overnight.) I've never had any problems with cold sensitivity myself and I've left it on for as long as 3 hrs. before. I don't think it'll make your teeth any whiter after an hour, or so......it's done its job and the potency has fizzled out. One thing I have noticed is DON'T eat anything with strong color after you've used this product. Like carrots or wine....I did my usual treatment, brushed my teeth then ate some carrots....then went to put my makeup on and freaked as my teeth were very orange! It came off pretty quick with another brushing...still...freaky.
1768037
I want to add that I do it for about 4 to 5 days. For best results, use it right after a dental cleaning. Once your teeth get whitened, you can use it only periodically when you feel it is necessary or again after your next dental cleaning. Hope that helps.
1768038
my experience has been one hour minimum and up to 3 hours or so. It loses effectiveness after about 3 hours anyway per their instructions.
1768039
I leave it on one hour but I'm doing touch up only, not original whitening. My original was done in the dentist office. I now touch up after each time I get my teeth cleaned. There is an instruction sheet with the package.
1768040
I left it on between 2 to 3 hours for the first three days and because I saw very little progress, I decided on the fourth day to leave it on overnight for the remainder of treatment.
1768041
Over night if you can sleep with your molds in. If not, it needs at least 3 hrs each treatment for best results. For touch ups, only about an hour each time.
1768042
One hour every week..instruction on the package..Enough for me ..Pleased with the result Marcy
136004
I leave mine on all the time, unless I'm leaving the house for more than a few hours (just a safety thing with me). It doesn't get that hot, however
1780451
I use it for work five days a week and leave it on all the time. I believe it has been more than a year. Come to think of it at least two years.
2123611
No you should definitely leave it on longer than that, a few hours at least. The color is vegan and won't hurt your hair at all no matter how long you leave it on, in fact its quite conditioning. The longer you leave it on the brighter your color will be and the longer it will last. I left mine on overnight and my color came out amazing.
1592115
I wouldn't leave it on for 6 days unless you have a real problem with oder. If you have a timer, you may think about letting it run for 10 or 12 hours. This unit is real strong.
2260613
stays on about 15 seconds, it can also be set to just stay on until you turn it off
1330620
No more than a couple or hours I think. I usually put it on overnight and it's done by the morning!
179013
Depends how long you leave it on. If you leave it on all night, probably a couple of weeks. It gets dimmer as the batteries die.
158256
You can leave it on. It is extremely easy to put it in. It is less than 1 hour for installation.
1895907
Yes, you can leave it on. We had about 4 and they were on for over a year and a half. We had no issues.
1627126
I keep this plugged all the time. I turn it on when I place a cup and leave it for several hours. Usually I have it on for 3-4 hours, but there are many times that I left it on more than 5 hours, and it seems to be fine. I even left it on over night by accident, but it was fine, ...although I don't recommend it.
524389
Always leave it on. Don't know exactly what it does but it's there to compensate the temperature
1235968
I leave it off most the time. Has couple hrs before I have to charge. Never timed but at least 4. Works good for me.
1424225
In the directions it says to turn it on for about 10 minutes, then leave it sit for about two hours undisturbed. That's it! I always use the timer, so I don't have to worry about turning it on and off. Some say they hate the ozone smell, but since I clean it so soon after I get up, I really am not bothered by it. I'll assure you that this will be money well spent!
2180959
I believe the standard recommendation is to keep it on for 24 hours. I choose to leave it on for 36 hours. I have found that personally if I leave it on longer than that my super sensitive skin reacts to the non-reactive adhesive. That is probably due to my skin being covered and no air reaching it and not to the adhesive itself. The often recommended 24 hour period has no noticeable effect on my skin but a HUGE effect on my energy level. I hope this information has been helpful
1324670
I have with no issues at all--I usually leave it on 30-45 minutes. Not sure if it matters or not but I figure longer has to be better, right? GREAT PRODUCT ;o]
1373861
Turn it all the way up to 5 and wait until the light goes off... It's about 10 to 12 minutes.