Firstly, we understand your frustration! Secondly, we do have a few solutions. The first thing you want to check is the adjustment on the strap. It could just be that the strap is too loose and needs to be adjusted so that it fits more snugly across your back or chest. If this still doesn’t do the trick, you could purchase non-slip tape and give that a go. If all else fails, we recommend that you contact the manufacturer for suggestions pertaining to your model.\r