Thanks for the advice. Using Bepanthen / Aquaphor regularly. It has been helping a little bit, but down side is you need to put a lot of cream and make sure to add more regularly. It somehow helps for keeping the urine not burning the ulcerated area (at least for a while), but on the other hand what happens with "drying" the ulceration area? It always stays moist.
It might be a good idea to keep her without the diaper. We will definitely give it a go.
3rd PDL will be this Wednesday, so two days to go still.