Our new windows are in, and they have used what looks like that rubbery seal you used at the bottom of bathroom tiles around the bath around the edges.
It is rubbery and dirt sticks to it. I cant keep it clean as the dirt just sticks to it. Because it is rubbery, you can’t dust or scrape the dirt off as it just ‘twangs’ - it’s like dusting jelly!
Any tips to get it white again?