Hello, I’m caring for a lady who has dementia as well as cancer. Every day when it's time to change her pull up she insists she is dry and that she doesn’t have to go to the bathroom. She becomes extremely nasty and just won’t budge. After about an hour and a half of her screaming and yelling eventually she will get up and go. It’s exhausting! Does anyone have any ideas on how to do this a little easier?