Clean or replace the ink absorber box on a Brother printer - Fix Error 46 on MFC or DCP

How to dismantle a Brother printer to access the ink absorber box for cleaning or replacement. If you have any other issues with your Brother printer please let me know in comments and I&do my best to help you :) Applicable for a number of MFC and DCP models including DCP-J4120DW ; MFC-J4320DW ; MFC-J4410DW ; MFC-J4420DW ; MFC-J4520DW ; MFC-J4510DW ; MFC-J4710DW ; MFC-J4620DW and MFC-J4625DW; MFC-J5320DW Model in video is a MFC-J4620DW. *Please let me know if it worked for a model other than these, so that I can update this list*