HELP MY CLEANER SHRIMP IS DYING!!

[Jonf1997]

Hi im looking for some help with my cleaner shrimp. Added to the tank about 2 months ago. All was good until last week when I noticed it acting a little lethargic. Then I noticed some white spots and a small black spot on its side. It wasnt moving for about a day and then something startled it causing it to flip over and thats when i decided to separate it in an acclamation box. It has been in the box for about 3 days. I can see it is still alive because I can see a pulse but other than that almost no signs of life. It has started to get covered in algae and I am looking for something that I could possibly do to help it. Someone suggested an iodine dip which i have on hand but and reluctant to try. I have another shrimp in the tank doing perfectly fine. They havent gotten into any fights as the both have all limbs and full antennae.
Edit: all parameters have been stable and he has molted 3-4 times in the 2 months that i have had it

 

[Idech]

Does it eat ?

 

[Jonf1997]

No I used a syringe to give him some mysis shrimp and he reacted to it but it was unclear if it was actually eating because it wasnt grabbing anything so i tried to feed it as close to the mouth as ai could get. I ended up going for the Iodine dip (Tank water with just enough lugols to tint the water) and it looks slightly more alive and is moving minimally again which is an improvement compared to the almost zero signs of life it was showing earlier today. It also cleaned up some of the algae on him. Still not sure what else to do. Ill probably do another dip tomorrow simply because any improvement at this time seems like a win.

 

[Idech]

I wouldn’t know what do either. I read they don’t live long, like 2-3 years. Mine was about that age and she just disappeared one day.