Any Je Joue Fifi owners - quick question

Does your Fifi have a pale colour on the insignia just above Je Joue?

I just wondered if this was normal - it caught my eye as I charged it the first time as it looks almost pink, but looking closer it looks a little like the silicone is rubbed thin.

The good news is, I've tried it and it works fine. Boy, does it work! I've never had such a rumbling sensation in me before.

The bad news (for me) is I'm a bit worried that it is actually worn and will compromise it when in action or cleaning.

Anyone able to help please?