Season 4, Episode 21: "The Smelly Car"

The first thing that we're gonna do...

...is flush the follicles with the five essential oils.

Then we put you under a vapor machine, and then a heated cap.

Then we shampoo and shampoo...

...and condition and condition.

Then we saturate the hair...

...in diluted vinegar.

Two parts vinegar, 10 parts water. Now, if that doesn't work...