Cheater plugs are not safe period. If you have a surge suppressor at the panel, then you should not be doubling up.
I doubt the electrician will solve your problem. Almost certainly you have a grounding error in your system connections. These sorts of problems are caused by potentials (voltages) between grounds, in your system. Cable systems, Ethernet cables for instance are common offenders. So we need to help you isolate and eliminate your ground loop. A cheater plug is NOT a safe or acceptable solution.