It was somewhere outside Barstow when Maria
wrote:

Ok, so Alien eggs are a design winner (!) but how the heck do you get
dried alien egg goo out of polypropylene carpets?

Never tried alien albumen - but most of those slimes (I had a
regurgitating Jabba the Hutt) are water based and not particularly
tenacious. They'll shift with a little soaking in plain water, or
failing that a steam cleaner.