Sorry, it's true. I'm in charge of a fleet of 22 bikes, plus my own 7.
Big spate of fork seals blowing on the Specialized bikes on the fleet. Head scratching for several months. The guy in the shop who had our maintenance contract at the time couldn't suss it. During a chance conversation with onevof the spanner monkeys in our own vehicle workshop, it wad asked how the bikes were being cleaned. Turned out a lot were, with the best intentions, liberally spraying the chrome fork stanchions with the Watery Destroyer to protect them from the elements.
It had been a big problem with the fork seals on the Forces Suzuki DRZ400 motorbikes and took a lot of puzzling to twig it.
On his recommendation we binned all the WD and replaced it with Rock Oil Maintebance spray. The problem ceased instantly.
Since then I've soaked a slice of rubber pond liner in WD and over the course of only a few days you can see the rubber quickly start to lose its elasticity and crack, as if it were ageing at a hugèly accelerated rate.