How do I clean after the drywallers?

Since this was a contractor, you are probably within your rights to call them to clean up. Drywall compound is water soluble. No need for Pine-Sol. Remove dried clumps by using a scraper, it should just pop off. Wet the surface and wipe up. Using a wet sponge with a scratchless abrasive side works quickly and well, and won't damage the surfaces being cleaned.