Please tell me how to stop this!
Most shoes rub backs of my heels the first or second time I wear them, then they're fine. But I've got one pair that I love but no matter how many times I wear them, they still rip my heels apart 
I've put those heel grip things in them to try to soften them. I've tried putting plasters on my feet before wearing them. I've tried the invisible socks. Why are they still rubbing?!