My son is a quad due to a brain injury. He uses a condom catheter. Its been 8 years and we are having problems with breakdown. Every thing I have read on catheters say there is a protective skin ointment we can apply before the catheter but no one says what it is. I am confused on what to buy.It needs to be something that will still allow the adhesive to adhere. I hope you can help. Thank you.