[Karren H]

I get those air leaks at the arm pits from time to time.... usually when I haven't used sufficient lubricant.... making for a poor seal around the rim.... If when fully pulled in they don't hit the end of the cup then you can use them... and they should work ok.... once you get the arm pit thing solved.... could also be they are too wide for your chest and they hand out to far..... try pushing them both towards the center when you start to pump....