imho...headlight washers are great thing (if you need them)

case in point: ...did a 7-day Baja, Mexico driving vacation from SF, California this December in my '94 E320 Coupe... the weather at times was pouring rain making the Mexican roads muddy slosh pits...

...the result was a front end so muddy the headlights were 90%ineffective...ans: with the the headlight washers liberally applied the mud was history and headlight effectiveness restored- no problemo

-fad