How to reset CANON IP 3500 waste ink absorber full?

All inkjet printers have a waste ink tank for ink which does not make it on the paper. When it's full, the printer stops working. You might be able to reset the counter in the printer, but unless you also emptied the tank, it won't help. It's like using a chip resetter to tell an empty cartridge it has ink. The ';out of ink'; error will go away but you still can't print. Unless you want to go through the tedious and messy process of emptying the ink tank, you are best off getting another printer. They're practically disposable today.