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LOL, If it fits thru the opening, you can wash it in the machine. Used to be that when something was designed, the mfg would add a “fudge factor” ie, “we need it to be so and so, add 10% to make sure”. Nowadays, many companies engineer their products for “perfect world” usage. As soon as something gets a little out of spec,….
As said above, check the amp draw through the switch, then find out what its supposed to be. Also, spade terminals are not the best choice for higher amp draw units.
I found a company called Modern Electrical Devices about twenty years ago. They have extra heavy electric terminals as well as silver plated ones. They might suit your needs for something better in spade terminals. I love their barrel type connectors for high amp/temp usage.