saaz,
How long have you had the helmet and did you register it with Shark?
The reason I ask is that I had the old, original Evoline (people call it the "Evoline 1" but it's like the first of anything, it's just the name with no figure behind it) Anyway.................... Shark give a 5 year guarantee. I've had mine for 2 years and the visors got 'sticky'. I couldn't raise them one-handed. I e-mailed the place I got it from, Action Motors in Parramatta, and promptly received stuff all, no reply, no acknowledgement, nothing. I even got an e-mail 'postmaster' advice that there was no such e-mail address................. strange seeing as that was the address I ordered them through (I got 2. One each for the wife and I).
I was riding through Victoria Park last Saturday when I spotted 'Helmet House' (didn't even know the place existed) so I called in to see if they could recommend/supply a suitable lubricant, for the visors you sick puppies.
The staff there told me to leave it there, they would lend me a helmet to get home (I didn't take them up on the offer but delivered it to them on Monday), and they would send it away for Shark to take a look at it.
I got a phone call today, Tuesday, advising me that the agent had been in, examined my helmet and authorised a replacement. Seeing as the 'Evoline 1' is no longer in production, they will be replacing it with an 'Evoline 3' ! Now that's what you call a guarantee

I suggest that you take yours into the nearest agent and see what they can do for you.
If anyone in the West is thinking about getting a helmet, I would urge them to give Helmet House their business (I am not associated with Helmet House in any way). The staff are only too willing to assist, even if you made your purchase with someone else. They have a huge selection, however I didn't look at prices as I was a bit 'shell-shocked' at their great service to a non-customer of theirs.
Right, I'm fed-up talking to you lot......................so I'm going home ........Oh, I am at home

Good night.