When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
They are lens sprayer, if your headlights get muddy or just dirty, it spits out water or cleaning solution. US doesn't carry those, but i believe Canada does.
Porsches (atleast carrera's) have these and they work great. My dad's 2002 carrera heats the solution (cleanser w/ anti-freeze) then pressure sprays the windsheild and head lights in order to melt any ice that may have formed. I think that is a great idea.
They actually would be of some significant benefi. HID's light scatter is bad enough when lens are crystal clear; when dirty, it's worse for oncoming traffic. And obviously, when really grimy, any headlight is less effective.