I had the I/C nozzles replaced under warranty today, all three were stuck open due to deposits accumulating inside them, they strongly advised using only distilled water, the user manual doesn't say anything specific about a certain type of water, it just says "water only", same on the water tank lid so I don't think I did anything wrong, it's probably why they approved it under warranty. I don't use it that much tough so it won't be a big deal putting distilled water in there, it's a gadget for road use really, I only used it 2-3 times to prevent heat soaking at red lights, in 30°C plus outside temps, in Belgium it's not a common occurrence lol.
Not cheap though if you're going through the dealer with no warranty, as the front bumper has to come off.
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