I just finished cleaning my rear window switch, mounted in the consol on my 380SE. Believe me, if the rocker switch doesn't work in either direction, you can clean these up to work like new in under 20 minutes. Don't waste time spraying cleaner in when the permanent cure is so easy.
Pop it out and disassemble each rocker. Mine came apart by inserting a small flat blade screwdriver and twisting in the side of the casing that holds the 2 pins on each side of the rocker. You'll see 2 wing shaped contact bars and 2 steel balls, one on each bar. Take the bars out and clean the surfaces, I used a fine brass brush. Scrape the little contacts at the bottom of the case with an X-Acto knife blade or similar. Put a dab of grease on the rocker springs to hold the balls while you gently re-insert the rocker, letting the case side snap back over the 2 pins. Put em back in and you're done.

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1986 560SL
2002 Toyota Camry
1993 Lexus