Is this supposed to be funny?
Comrade, we are just goofing around.
You really need to toss the sleeve, though.
There is a thread (maybe someone will link to it) where a few folks have reported the exact same issue as you: sleeves deteriorating, leaving a residue on HuCARD, sometimes even ruining the print on the HuCARD.
HOWEVER, I have never heard anyone reporting that the HuCARD is inoperable as a result of this residue.
I don't think all sleeves are going to become gooey...I have not experienced any problems yet (and I have a many NA and JP titles).