[MENTION=41323]Trewin[/MENTION] I'm no expert on monitors, i'm just going off what I've seen in dragons/bluetounges.
If one of the toes is pointing in a weird direction, another possibility would be an injury to the foot, which could also cause swelling, especially since you mentioned you only just noticed it. Stuck shed takes awhile to build up that thickly.
Setup looks pretty good, but as for the spraying, the heat lamp/mat/cord ect would most likely dry it out pretty fast, but if they burrow, damp substrate can help hold burrows, so it could be worth doing. Placing some damp moss in the hiding area around shedding time, aswell as the occasional soak should be fine to help with shedding.
Overall, Just keep an eye on the foot, any changes in the negative direction should mean a vet visit.
As I've said I'm not and expert and I cannot say 100% what it is.