My pixma MP500 printer prints a black solid line at the back of the sheet. what's the problem

Ink is coming up from the bottom from the purge assembly. The hose that should take the ink to the ink absorber makes a pile of hard ink and it overflows instead of being spread. It needs a good cleaning to get rid of the excess ink and a mylar strip to keep it from happening again. 80 to 100 dollar shop repair unless it's under warranty.