I was in TV repair for 34yrs. WD40 is ok for cleaning controls. Better than most sprays. They had many sprays just made for cleaning controls and tuners in the old days, then some safetycrat made illegal the propellant, then after that the "safe" formula would melt plastic and ruin everything. WD40 never hurts anything. It's not flammable unless you hold a torch to it as you spray. Just my opinion after using it 1000s of times. Others may have differing opinions, mostly from reading fables.