has anyone else experienced this?

TorkLift
Legendary Lifetime Warranty

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Shoot these pics over to TL and see what they say. I bet they mail you out some new ones.

X2...looks like a bad batch of rubber or too much heat was used in manufacture....mine are 2 years old and look same as when installed.

Bad batch of rubber.
That's the problem with rubber and plastic, that you can't test its quality.
Driving Mercedes for long time, I had older models where 30 years old rubber pieces were holding well.
Than in 2000's with global economy - Mercedes subcontract parts manufacturing to former East Block, or even India.
So on newer cars rubber grommet and plastic holders were disintegrating after 3 years.
I come to the point when having 5 yo car, I was going to junk yard to salvage 20 years old grommets and put them in 5 yo car.

Shoot these pics over to TL and see what they say. I bet they mail you out some new ones.

nope, I live northwest of Houston. Not much extreme cold here, sadly:)

Did you use them in extreme cold?
I put hockey pucks on my truck and on year 3 they hold just fine.