Interesting! But unfortunate that it didn't dry out during the day.

Since you're using so much wattage anyway, I think the best and easiest thing here is to put the frog in the smallest room of the house and use a small oil-filled radiatior and greenhouse thermostat to raise temps of the room to a more suitable level. If you even set it to 70F it would be good. 60F means at least an increase of 14F of heat is necessary at night alone and that's just so much. The maximum I would go is 10F for day. You'll find it much easier this way to maintain enviromental conditions.

When I kept my frog in a room at 65F and it was just too much of a struggle. Rooms in the 60sF can be good for salamanders and some temperate frogs, but tropical lowlands should generally be kept in warm rooms about 70-75F. Unless a frog is kept in a very large tank, the rule is to only use low-wattage 25-60W bulbs for heat, although I would use 60W for 20-gallons+