however, it does dry up internally which will slow down the movement.
The only thing that stops the water from getting into the casing is a rubber boot. This one looks fine...
...until you extend it. Then you realise it's split. Considering how low the actuator sits, it can easily take a drink of a puddle.
Pull the rubber boot off. The problem now is that this part isn't available separately from smart.
Luckily there are suitable ball joint seals that fit nicely.
I tried a few options but Martin T came up with the best fitting option.
These are the ones I bought, they are the small size he has for sale.
If you can get the split rings on, try it. I didn't even bother.