In defense of the suggestion, benefit of the doubt and all, I'm gonna guess this has come from some experience with weak or flaky secondary ignition problems which tend to show up on misty, rainy, humid days. Otherwise, I have found a good thorough wash is a great inspection tool for a car. The best 240 purchase I made, I insisted on being permitted to wash it myself, in the seller's driveway. That's more of a rust belt advantage, than for Socal or Arizona.

But back to the fuel issue, it is typical for it to disappear after you fill it with cool gasoline, or the sun goes down, because it is related to the temperature of the fuel, and the vapor phase of the gasoline-ethanol mix. Just do the simple test with the paper clip and rule out the tank pump.




--
Art Benstein near Baltimore

Since the ends of the bulb usually burn out unequally, some "net DC" may try to flow through the ballast. My experience is that the feared core saturation effects do not occur.