The parts really needed a quick wipe down, but as soon as they got belowdecks Merri would probably notice that things were getting a little dusty. Once a year or so Wil might notice. Or take an apprentice on for some little thing for the Thieves' Guild and get the ship cleaned.
The last time that happened, however, was two years ago.
"Yeah, sure. You like cleaning right?" Wil asked with a flashy grin and a gleam in his eye.