Too bad there isn't a clear top coating on the frame because there is a danger of removing the decals.
The stuff on the tube might be glue, if this frame was mine I would get a q-tip and wet it with water and dab around the edges to see if it softens (staying away from the decal)...if that does not help, I would try mineral spirits in the same way...if that seems to soften the goo great...looks like a bit of the decal has already lifted...be careful and good luck.
Best, Ben