The message usually appears when the waste ink pads, which absorb excess ink during cleaning and printing, are nearly full. The number of prints before this happens can vary but is often around 5,000 to 10,000 pages, depending on usage and how often you print borderless. When it does happen, you can either replace the pads or reset the printer's waste ink counter after servicing. If you're unsure, contacting an Epson service center is a good option. Hope this helps!