I called Edgepark about this problem and the customer service person said that having an ileostomy might be the problem. With an ileostomy, the output is too liquid, causing the output to ooze through the filter. She did say Edgepark would send me another box to try in case the first box was defective. There must have been some misunderstanding though because I received another box of the drainable type with a filter. Getting the right equipment is a pain.