Yukky hot things might give her a skitty bum.
Are you feeding her cardboard (pellets)? Try changing your food to something yummier like pure corn or mixed grain, add some black sunflower seeds to it or a bit of porridge oats, or an odd treat now and then of cous-cous with a knob of butter mixed in, spice up her life not her backside

. She's only looking for something that tastes of something other than what she gets every day. Give it a week and they usually forget about it.
Or start making wringing motions with your hands, she'll get the message.