I'm sorry to hear that.
Maybe your lips don't need GIAB. When I first started with GIAB, it worked like magic, lips were close to being healed but then I unfortunately removed the product and the new skin died (Should've kept it on). I thought if I applied GIAB again, I would get the same good results but that was not the case. After weeks of trying to find out the reason, I discovered That GIAB healed some layer of skin (dermis maybe?), so my lips can't get completely raw anymore & GIAB only works when the lips are completely raw it seems.
Pilou, have you tried keeping your lips covered with aquaphor? That's what I'm doing now & it seems to be working for me. When previously before I discovered GIAB, I applied aquaphor it did nothing.