I have owned Deco E4R set for almost 2 years now. It used to working flawlessly but recently it started to produced fluctuating strength of wifi signal, although we use it within 1-2 meters away. We have another router that connected to the same modem but produces stable signal. I have used Optimization tools in Deco Lab, analyze tools also shows low interference. The software has been updated with most recent. Not much changes done on it. Have you guys experienced this and what else can I do? Thanks