Although the top and HS after 3 months

Then, we begin to have black stripes (3-4 per page) on the back of the sheets. It cleans and cleans and re-re-re ... but no change.

We put it in the trash and buy a toner Canon (very much more expensive) and it is hoped that 6400 pages will print correctly.

Whether to buy toner 6400 pages but throw it at 2000 pages, in reality, we are left with a product that costs 3 times more expensive and pollutes 3 times.