Not all vacuums will make a mess with ashes. Many shop vacuums are designed to handle fine particles like soot. The customer might have a point if they own the right gear.

Man, I totally get what you mean about the butter overload. @barbara_green is right that they're still full of butter, but that cardamom spice changes the whole game. After eating so many croissants, the warm flavor feels like a real change of pace. It's just nice to have something different for a while.