Hi Canadianmum
Although I no longer have the bag it took me 10 months to finally find a way to help stop the bag leaking.
First I stopped changing the bag in the mornings. I had a bath last thing at night before bed then made sure the area was completely clean and dry, (Im sure you do this anyway). I would lay on the bed as flat as I could and do the bag change, always using stoma adhesive paste. I found the less adhesive paste the less likely it would leak, to much held the bag away from my skin. Once I had done the complete change I would go to sleep. I found by doing this I gave the bag a good 8 hours to set while I was sleeping and not moving about. Also by bedtime most food and drink had already passed through into the old bag which meant the new clean bag wasnt having to deal with waste. NEVER drink anything before a bag change or soon after a bag change the liquid will loosen everything. By doing this last thing at night my stomach wasnt bloated from having eatten, so putting a bag on when your stomach is at its flattest sticks better, rather than having a bloated stomach and stretched skin.
I hope maybe something here helps. Lifebegins