Runny, extremely smelly poops

[Prometheus]

Prometheus is now having a problem. His poops are extremely runny and very very smelly. I noticed this about a week ago when I was cleaning his cage and discovered one of the poops. I thought it was maybe a one-time thing and this is about the third time he's had an extremely runny smelly poop.
How bad do you think it is? I will be telling my father about it and I'm hoping we can take him to the vet.

His enclosure is set up with one basking light and One ceramic heat emitter, the warm side stage between 90 and 100 degrees Fahrenheit, the cool side stays between 75 and 80 degrees Fahrenheit, humidity stays between 30 and 50% sometimes it even goes up to 60% he gets about 30 to 50 BSFL a day. He gets greens every other week. Takes a bath at least once a week. Water is given to him daily (I out water droplets on his nose for him to lick) Currently the substrate is paper towels. Has plenty of leaves and sticks to climb on 1 basking area and two different hides. And I play with him for about an hour a day.

Here are some pictures:
[XIMG]858936551236738[/XIMG]

How bad do you really think it is.

 

[Prometheus]

Heres the first image.

 

[CooperDragon]

If it was a one off thing I wouldn't worry about it much but since it has been continuing it's worth getting a sample checked by an experienced reptile vet. It could be caused by parasites, in which case treatment is usually pretty easy and affordable. It would be good to rule out parasites as well and know that perhaps the issue is diet related.

 

[loserisme13]

Did you say you only give him greens every other week? He really should have greens available to him everyday.