High beam blue indicator lens too dark

Hello, since days my high beam blue indicator light was not working.
So i replace the bulb and test it but same. No problem with the bulb it work.
Then i notive that was the blue indicator lens that is now too dark to let the light pass over....
Is that a common problem with years ? Can i replace this lens ? Can i restore it and make it more clear ?

 

Can you see if the high beem indicater is on at night? Sometimes I can't see the indicator in the daylight, but it's ok at night.

Looks like it´s time to renew the indicator cover.

 

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