One at a time. Maybe so. Dan wasn't so sure, but he thought that he ought to try something - because keeping his mind weighed down with the lockboxes, gathering dust and forever a looming presence, wasn't an appealing option at all. Dick had showed him the trick when he was a kid, freshly scarred from the events at the Overlook, but he was an adult now. He needed a more permanent solution.
"Will you show me how?" he asked, since he had absolutely zero experience with banishing things - creatures, ghosts, anything else - to Hell. He didn't even know if he had that capability at all, to be honest. "Not right now - " Because they'd just eaten and there was a very real chance that stirfry goodness would come back up if Dan even attempted to mentally go near those boxes. "But...soon?"