The best way to avoid DE is to eliminate or unplug any devices or technologies causing it. These include things like light dimmer switches, some appliances, battery charging devices, hair dryers, solar power systems & powerline adapters. Perhaps one of the most common DE culprits are compact fluorescent lamps (CFLs) as they contain an electronic ballast, which emits high frequencies into occupied rooms along the entire length of the branch circuit that they are screwed into. Electronic ballasts have passing 50 Hz in and can emit up to 25,000 - 30,000 Hz on the wires that leave the ballast. You can also use DE filters to reduce DE further, these plug into mains outlets causing interference filtering technology to “short out” (or shunt) erratic surges and spikes of electrical energy, while allowing standard electricity to pass through unimpeded.