k70 rgb rapidfire Key chattering

Around 8 months ago i bought the k70 rapidfire, at first i loved the keyboard,still do.Two months after my e started double tapping for some reason,i've searched a bit saw that you could try blowing some air on it and so i did.That seemed to have fixed the issue for the time being,2 weeks after that my w started doing the same thing,i blew air on it cleaned it nothing.After a while the issue resolved itself and i was happy about that.Anyway this went on for 5-6 months and today most of the fps keys (w,d,e,s,a) do the same thing and my 9 doesn't work on the first tap or second.Is there anything else i could try?

Thank you in advance.