Question about Canon Pixma Ix6850

No, it doesn't need it and I don't know it either!

No, not to my knowledge. Never had to.

Nope...never heard of it...and I've been printing with Canon Pixma for years :-)

No, this printer does not need it

I rarely use the printer, and only for photo prints on glossy paper. I have never used a maintenance cartridge. However, it works very well and I am satisfied with the printouts. Occasional printing prevents the cartridges from drying out.