The key is there: it was enough that 15 days to solve a problem that has lasted more than 8 years !! A specialist at the University Hospital of lénurésie had advised me, there had to be three phases: - Watch the first sounds, the child hears nothing, he must get up and put the toilet - The second, the child hears and goes to the toilet - Third, the child still has his watch but reacts before and goes to the bathroom and there is won !! We have not had the first and soon our child wanted to remove his watch and woke up alone.
The only "problem": this system is difficult to implement with layers: the layer must be drilled on the side ... and sometimes it sounds because there is too much contact, sometimes it comes off because there too thick !!