I used CRC’s mass air flow sensor cleaner (about 10$ a can)
1 can will do; spray them down very good & let completely dry before re-installation,
I wouldn’t use anything harsher on them/?as this stuff is really mild & designed for it... may take a couple good douchings of each one & be sure you’re spraying the filament/wire good.
Good practice to perform on regular basis.
Good Luck & have codes read & recorded before disconnecting batttery & clearing them off.
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