Child Height Marked Wall

Just about managed to get the lowest (son at 2 years was 89cm on 17/03/11) and highest (daughter was 171cm on 27/09/20 just before her 14th birthday). It also has our Italian daughter at 169.3cm on 16/9/17 when she was 17.

It is fading and very grubby. What to do? Repaint and rewrite? Leave it as is?

We've lived here since Oct 2007.