Here is the closer pic
He is just using bark and nothing else in enclosure just lighting, and waterdishWhat substrate is being used and what kind of things are in the enclosure?
Under a VERY bright light, maybe even out in the sun, and using an optivisor or magnifying glass, use a needle or straight pin to pick at the nostrils. Be very careful.
When he got the substance out the first time what did it look like? Was it hard? Did it look like his bark? Food possibly?