I have an ileostomy and find filters useless after the first night. I think that by lieing down (which you possibly do in the bath too) stool gets to the filter and clogs it up so while the sticker may prevent water getting to the filter from the outside, it's clogging up anyway cos your liquid like stool is clogging it up from the inside.
I have had an ileostomy for 31 years now due to UC.
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I'm not a complete idiot - some parts of me are missing!