So I usually see poop answer such after the fact but found this hanging looks like he his very hydrated? I just wanted to know if this is normal stuff or should I be more concerned?
I also have a Jackson, and that to me looks like a urate. Sometimes they stick to a leaf rather than fall onto the floor - I am guessing you also found poop somewhere below this urate? Sperm plugs are a different consistency to urates. I wrote the thread 'Hemipenes and Sperm Deposits' mentioned above with a little photographic help from Monty!
I also have a Jackson, and that to me looks like a urate. Sometimes they stick to a leaf rather than fall oto the floor - I am guessing you also found poop somewhere below this urate? Sperm plugs are a different consistency to urates.