That probably woke up people.
BUT ! try the same on a car sized AUX engine in a ship and with the fuel pressure gauge, and the damn thing burning MDO and not sweet pure diesel,,,,, and you are in for a cleanup.
And then do that almost every month and if you are the one that have to put on a new gauge,,,,, and clean the immediate surroundings,,,,,, no fun at all, and you start to curse engineers and gauge makers.
And you start to second guess yourself as it was after all you that put on that gauge, even if there are not really any way to put on that gauge wrong.