Around here there are many car washs that require that someone is outside to start the machine. Youīre supposed to drive in, walk out and start. So you wouldnīt be in if something went wrong.
Iīd probably try to use my cell phone to contact someone. OTOH Iīm a biker so using the car wash isnīt an issue anyway.
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If it isnīt broken, it doesnīt have enough features yet.