How to repair leaking ink on Hp Officejet Pro 8500?

Hp Officejet Pro 8500

Leaking Bottom Cover

This printer problem is leaking ink from the bottom cover. All of the inkjet printer coming for solve the leaking ink after two or three times repaired waste ink error, because when we have absorber full error, we have to change the absorber ink pad in the printer, but technicians just reset the ink counter and pass to customer the printer. we must change the absorber ink pad every time we get the error message. For solving we have to open a printer and exchange the absorber ink pads and cleaning inside the printer.