FDS Zelda won't save, keep getting error #26

[eCockpit]

  Hey, I just got a copy of Zelda 1 for FDS, and the save feature doesn't seem to work.  Every time i try to do anything, like kill mode or even saving, it gives error code number 26.    Please help me!

[eCockpit]

What are "tounges"?

[Frank_fjs]

The disk should have 2 tabs, one on each side.



Look in the top right and top left corners.

If yours have been popped out you will need to cover the holes with some tape.

[eCockpit]

They're both intact, placed tape over the holes, still error 26. 

[eCockpit]

Sadly, I don't currently own any other FDS game that saves, but I can confirm there are some splotches on the disk that i tried rubbing off with q-tips.  Should I keep trying to get rid of them, or shall i just return the disk?

[eCockpit]

What kind of cleaner do you recommend?