Have just heard a paleontologist say this, which blew my head off:
When a T-Rex was alive all Stegosaurus were already fossils. A T-Rex is closer in time to an iPad than to a Stegosaurus.
Thank u @mrshinchhome i have never used star drops vinegar spray b4. Both my shower screens now look as good as new with no effort. Maybe cleaning can be enjoyable!๐