Mouse for 7 years

Hey there Razer community!
I currently have a Razer DeathAdder Chroma that I got for Christmas around 7 years ago. My current problem is that when you click the left click there is no force behind the click anymore. It seems that it has finally worn out. My question is, is this a plastic or main electronic problem. I wanted to see if i could order the outside case for the mouse because i do want to keep the mouse because it has lasted me all these years. Since then all of my stuff has been razer products. Or should i order a new mouse. I dont have a problem with ordering a new one im just asking. Being able to say that my mouse has worked for this long is a flex you know