I have never had relapses but have had to go through the build up stage again because I have neglected to do the weekly maintenance. In the simplest of terms this machine propels ions that are in the water into the pores on your hand, essentially clogging them, aslong as you keep them clogged you are never going to sweat, impossible to relapse or anything.
(As the low current passes through the area, the minerals in the water clog the sweat glands, limiting the amount of sweat released.(Which is why adding baking soda can help, adding more minerals).
If you have built up for 30days and still dont have the results you disire I would add Robinul to the water, studies on this forum have found that adding Robinul increases the effectiveness dramatically, you need to do less build ups and can last longer without the need of maintaince, although it is still important to get in the habit of weekly..... also you should notice the complete cessation of sweating.
Tip Tho, Avoid lotions and soaps through the day, after you have applied lotion on other parts of the body, wash your hands, and stay away from soaps, instead look for hand sanitizer(maybe even then washing it off after use with water...). I have found the moisture of these soaps and lotions to weaken the clogged pores and bring the sweating back faster.....