This aged-school trick will free up the toner particles which are trapped to The within partitions and nooks. After you mount it back in your printer, it may well sign up it as full. You might need to deactivate the ink-preserving method for that printer to detect toner levels properly. https://hp-61-printer-ink18383.blogscribble.com/38073438/the-5-second-trick-for-ink-printer-hp-680