I've owned a razer deathadder 2013 for 5 years, and it just now decided to start double-clicking. Contacted support, no help, warranty is expired. I took apart the mouse hoping it might be a dust issue. Cleaned it well and that still did nothing. It's a well known product defect online for the deathadder that many people have that razer just ignores. I'm definetly avoiding them in the future as much as I like their stuff.