Something I found in "I Second That Emotion"

[on:]

Now, when Fry, Leela, Bender and all of the mutants are walking in the Sewer city, a sign changes from "Dry Cleaners" to "Cleaners".
Here's what it looks like after the transformation:
I dont have a pic of the "DRY CLEANERS" sign BEFORE that though.
Another Transformation:
this
into
this

[Reply #1 on:]

Those appear to be mutliple signs...

[Reply #2 on:]

Every sign they passed said something about drycleaners.

[Reply #3 on:]

Besides, it's a sewer. Everybody knows that signs in sewers change every few seconds. It's a scientific fact.

[Reply #4 on:]

Ah, the "Law of Sewer Sign Metamorphosis."  LSSM gets you every time.

[Reply #5 on:]

It's a smelly sewer. Dry cleaning is a much more competetive business venture down there, surely?