Panel 1: We see Elly cleaning the inside of the picture window.
Panel 2: Next, we see Elly outside cleaning the outside of the picture window.
Panel 3: As Elly turns to put the ladder away, what she does not know is that Liz and Farley are smiling as they try to get her attention. What Liz does not know (because she does not learn from the past) and what Farley cannot know because he's a dog is that when Elly sees the smudges they left on the window because they didn't think to wash before trying to say "Hi, Ma!", they're going to get the loud wailing about how cruel children and pets hate her and want to work her to death Mike gets tomorrow.
Summary: If one wishes to get on Elly's bad side on a forever kind of basis, one would do well to tell her to tell people in advance what she's going to clean, when she's going to clean it and how long to stay away from where she cleaned. This is because she doesn't want to admit that people can't read her tiny little mind. It would be like telling Lizardbreath to pay attention to her surroundings instead of bumbling around like the most oblivious twit ever.