It is unproven that EMI/RFI causes symptoms such as you describe. We are surrounded with radio waves on this planet. It is not just man made in the environment, it is the wave lengths that you do not see when the Sun is shining, or even when the moon is out.
Any planet in this galaxy is bombarded with so much radio waves, it is beyond what you could imagine.
As for removing DirecTV cookies, I do not know how that solves your problem. If it does, keep us all informed.
Really the only way to protect yourself from any type of EMI/RFI, is to go live inside a Copper Ore Cave, with a big Copper Ore Boulder in front of the opening to your cave.