My cakes get really mouldy/sticky within days if I don't refrigerate them during rainy season or when it's too hot. My cakes pass the skewer test before coming out of oven. This has happened for most of the recipes I have tried. 

I try to make my cakes with lesser sugar and wholewheat floor instead of white floor. My temperature knob is wrecked - takes twice as long to bake. Has any of it got anything to do with my cake rotting sooner? 

Any thoughts?