Morning, 

not really sure what they’re called, but the rubber that sort of squeegee the windows… I have a 2015 L&K Superb and the rubbers are dry & crusty… seem to have a bit of moss even… and the squeal if you lower a window. 
is there a way to restore them to their former glory? 
A good wash & scrub then some sort of silicon lube maybe 🤷🏼‍♂️

 

cheers 

Martin 

Yeah that's about it.  I prefer to use GT85 as it can be used on some much more, good as a penetrating/releasing fluid, longer lasting lubricant (than WD-40 Multi-Use) has PTFE instead of silicone (which some painters don't like) and smells nice too.

 

 

Also have a look at the last section of this vid for help to stop the squeaking. - https://www.youtube.com/watch?v=6B6dSwFW98M

 

HTH.