Question about 21FBP22

[Daave]

This tube I have in my set is, with my understanding, not a tube that can get cataracts (glass not bonded to the tube). Was there some oil or something between the tube and (what appears to be plastic) safety cover? On mine its like possibly something drained out? I can see something that has run inside and its making the picture hazy, and on the inside of the cabinet there is something that looks like it leaked out. Can this be taken apart and cleaned out? Do I have to refill it with oil or something?