I have the Razer DeathAdder V2. When I click my left mouse button, one-third of the time it is registered as a double-click. Bushing buttons, firing weapons and doing most non-game-related tasks are either impossible or irritatingly difficult. I am hoping that the answer isn't: Take the mouse apart and clean/repair it. Get a new mouse. If I have to get a new mouse, it will assuredly not be from Razer. Though, I'm hopeful I won't have to.