You probably misjudged ovulation unless your husbandry is pretty off. She should be on the hot spot most of the time before ovulation and stay on that side through laying. If you have her on paper, I'd switch to coco bark or cypress mulch now till after she lays IMHO. Humidity being right is a lot more crucial for laying than any other time and I just wouldn't risk it with paper. Spot cleaning is fine, but I wouldn't do any deep cleaning till after you pull eggs.