10 ppm is significantly slower than current 20-30 ppm models.
Pull the protective sealing tape straight out from the side of the cartridge until it is completely removed.
If your prints are fading or streaky, it is likely time to swap the cartridge. This model uses the (or compatible) toner cartridge.
, which combines the toner and drum into one unit for simpler replacement. Canon imageCLASS D530 (L10577)
If you are buying toner, don't search for "L10577 toner." You need the Canon 067 toner cartridge (or the 067H high-yield version).