Is the room really cold or something as a 10 gallon should be quite warm with almost any type of UTH. Are you sure you are measuring the temps accurately. What type of thing are you using? Is the UTH actually running right. Just seems odd that it won't heat such a small area. Definitely cover up as much of the screen lid as you can to hold in heat and humidity. Not sure what else to suggest other than auxillary heat lamp maybe or a quick switch to a small rubbermaid/sterlite which are just generally easier to manage. I'd definitely check that UTH though and make sure it's actually working to it's capacity.

Quick question...what do you use for substrate?


~~Jo~~