Are they 6mm or 9mm? Are you having insulin delivery issues or do you just find them uncomfortable?
I'm not an expert nor would I pretend to be, but it sounds like they might be kinking. Do you have any pain or discomfort prior to or during the NO DELIVERY error? And where on your body are you trying to place your sites when this is occurring? (if you don't mind sharing)
They were pretty hard to get used to, but once I got the hang of them they worked really well. Would suggest to give them another try, and keep them for back up.
I could use them if you're giving them away.
How much body fat do you have? I haven't noticed any difference using the Mios vs the Quicksets other than the fact that the Mios don't stick to my skin as well as the Quicksets.
The wipes don't work for me either. Try skin tac and/or opsite flexifix.