Hi anyone have a 6qt kitchenaid mixer and mixes marshmallow fondant with it? I just bought one and it mixed about 10 min and turned off completely in the middle of mixing it got warm and turned off for about 15 minutes.. anyone els have this problem? my 4qt I have for 10 years now never turned off so was wondering if this is normal? I'm thinking I should take it back? this is only the second time using it... TIA