Why is my paper jamming every time?

I had a similar problem with as Pixma TS8050. Took a damp cotton bud and tissues to clean all the rollers at the back, under the cover. It now does not jam on 2-sided printing.

My MG8220 was jamming if fed from the cassette, or the rear tray. I tried everything! But then decided to REALLY clean EVERYTHING in the paper path. The rear rollers, the rollers behind the ink cartridges. which I think was the culprit. I took a q-Tip and simple green cleaner and scrubbed and scrubbed those rollers. I discovered they were in fact not black! They are grey! There is also a metal bar below the rollers that has a somewhat gritty surface. I am guessing to aid in paper moving through. I cleaned it also. After I was satisfied it was SPOTLESS, I fired it up and printed perfectly from cassette or rear tray! YEAH!

It is the printer paper sensor switch that jams located on the right hand side of the two rollers when viewed from the paper tray with out any paper in the tray ,tried to no avail to find out any solution .Firmware and Drivers update so must be the sensor or software within the printer fault .Bad design or perhaps in built on purpose .

The following is a general guide to Fix paper jam issue use the following procedure.