I guess jlb2 is right, thread it on the deck and give it a two second spin. You'll know in a hurry.
I have Quantegy and Ampex 456 spools here and never had a problem with the Quantegy tape, that way. One of the Ampex spools squeaks, though.
And, I've got a lot of Maxell XL-l 35-180B, bought in the early '80s. In all this time, they all played just fine. In the last two or so years, three of them are SS. Those tapes were easy to find and buy then, and I've bought a bunch.
I might try the Nu-Finish treatment on them. And I know, the first time I ran into it, I didn't know what SSS was. I think I spent twenty minutes cleaning all that stuff off the tape path. Once or twice through that and you hope to not have to go through that again. A second or two won't leave much, and not like me, while trying to figure out what that was, and after a few minutes, I guess I had worked it in pretty good.
What a mess it was!
Lu.