I just went to check on Sebastian and there's a brown gooey mass in his tank. I have found this once before but it was dry (from the lights). Is this him regurgitating?
Sounds like it probably is. Be sure to feed him bugs that are no longer than the space between his eyes, and make sure there is no loose substrate in the tank. The temps. also must be about 105 in the basking spot for proper digestion, and make sure not to feed him too late [ a large meal ] that doesn't give enough time to digest.