either they were defective or my body wasn't melting them, but it wasn't coming out and it was like hard clumps up there leaving not too much real estate for the next one plus I started getting very irritated down there, so I switched back to the PIO and I have to say that it is much easier than inserting 4 times a day. It does get bumpy and sore but just do 2 days on one side and 2 days on the other. It kind of gives each side 2 days to unlump. I find it easier to just be done with it once a day, plus I feel like I am getting all the medicine I am supoosed to be getting. Good luck!