Carpet I think you just sound bitter since your treatment didn’t work so you’re not thinking logically.
How can you possibly guarantee something like this? You can’t treat an area then a year later be able to tell which hairs are new growth and which are ones that may have come back from the laser not working. They would look identical so it’s no different at all.
I think what you’re forgetting is that laser can’t treat 100% of all hairs on all types. If it could it would be different. Meaning, if I did 6 treatments on my underarms, and then I was 100% hair free at the end, and then a year down the road 50 or so hairs are back, then sure you could pretty much safely say you were hair free for a year, so therefore this is new growth and wouldn’t count towards the guarantee. Or, same scenario, but 5 months after your last treatment you get those hairs back, you would know that it probably wasn’t new growth.
The issue is that even if you look at a body part which LOOKS all dark and coarse, you have to remember there’s still fine hairs mixed in and also lighter blonde hairs mixed in. That’s the reason it’s permanent hair reduction not removal, since yes it will get rid of the dark hair but you’d have to do electrolysis to get those finer hairs.
Again I think you’re just bitter that your treatments didn’t work since I don’t really know what else to tell you. There’s way too many variables involved when treating a person’s body. It’s not like buying a fish or a plant where they can say if it dies in under a year we’ll give you a free one.
There’s virtually no way a year or two after your treatments end to tell if hair is new growth or hair coming back from the laser not working. Put it this way, like others have said, sure clinics can offer a lifetime guarantee, but you’re going to pay for that. You can’t honestly expect to pay a decent price for treatments, knowing that you can get many more later for free.