Well my whole keyboard oftenly types multiple letters to the point it less likley for it to type normally (im curently using another keyboard) i would like to know if there is a way to do it since my keyboard started doing it a little after warranty was over. Here is preview of how it is:

HHi ii  currentlly hhave a biiiit of pprroblems wiithh  mmy keyyboard anndd iii  want  to knnow  iff tthhherre is a  waay to   fix  itt,  its  hhhappeniinng  on every siiiinngglle key evvenn ddelete oorr bbaackspace..

It was intended to type: HI I currently have a bit of problems with my keyboard and i want to know is there is a way to fix it, its happening on every single key, even delete or backspace. It sometimes writes 5 letters in a row. It started happening a year ago but i found ways to go a bit around the problem but i wasnt complete solution( i used 3rd party programs to not detect any typings inside specific time) . I tried on other devices and the problem is the keyboard not a pc or laptop. 

i dont mind opening it and trying to do someting with it since it was expensive and I dont want to buy a new one if there is a way to fix it for free. (my friend also has razer and it works very well, he got it 2 years before me, and it seems i got a wrong choice or smtng) . There was also no video on yt to fix such a problem. Please help if you can or if you have/had a same problem. Im posting it here cuz it wont let me write to staff or moderators (warranty is over)