Waste ink absorber is full can i replace or clean

Follow this:
1. Turn off printer
2. Hold down Resume button and press Power button.
3. Keep holding down Power button and let Resume button go.
4. Press Resume button 2 times then let BOTH buttons go.
5. Green lights will flash and then stop blinking.
6. When green lights are solid, press the Resume button 4 times.
7. Press the Power button and the printer should turn off, if not, press the Power button once more.
8. Your printer should respond as normal.
The waste ink absorber is on the back of printer.There is one cover who can open from the left side.You can replace it or clean it but the procedure is dirty and prepare yourself to get dirty.