If she's just exploring, she is having fun exercising herself. That is very, very good. If she is probing the edges, corners, and glazing with her snout, that is escape behavior which may damage her snout, and needs to be resolved with a large enough cage and/or a better hiding spot.
Do you have a non-contact thermometer yet? You can directly measure the temperature of her skin with them. Get one at Radio Shack or Harbor Freight Tools. In the basking zone, the skin can be as warm as 104F, down to 90F. Regular thermometers gain heat, so they give falsely high readings in the basking zones, so they don't work to take this kind of temperature. I discovered a consistent way to measure hot zones: tear off about 3 inches square of lightweight bright white printer paper and put it on the ground directly in the middle of the hot zone. When the paper reads 140F, the zone is at a good temperature. They read hot because there is almost no mass to the paper and it quickly gains heat to it's heat-holding capacity, which for a 95F hot zone reads about 140F. This isn't intuitive so most people don't want to use this method. But it works great. Folds in your iguana's skin can be up to 104F and still be healthy and very much enjoyed when the iguana uses these hot zones. All of my igs loved it once I discovered it. Trust your ig to move away when she's satisfied. They move off to one side to lower the temperature of their heat experience. High heat helps to kill bad bacteria like fevers do for us, and boosts their hindgut fermentation so they get better nutrition (carbs from fiber).