The tube, which I bought in December 2021, says
Batch 21E11 Expiry 05/2023
I'm taking this to mean that it was produced one month before purchase, and at this time still has 15 months before expiry.
I cut an ample hole and, one minute later, squeezed, but it protrudes from the wrong end, as you see in the picture.
What might be the cause of this? Does it mean that it has solidified near the nozzle end?