Canon i250 prints poorly

[leftymills]

When I set my Canon i250 media type to "plain paper" it prints poorly
in both high and standard quality. Still using plain paper, when I set
the media type to "photo paper pro" it prints perfectly at standard
quality setting.
I use generic ink exclusively. I pay one pound sterling for black (in
quantities of 10) and one and a half pounds for colour for each
cartridge.
Can anyone suggest how to correct the printing when the media type is
set to "plain paper"?

Lefty

 

[Chuck]

Change the type of "plain paper?
Seriously, You need to explain "prints poorly" Are characters faint?
blurred? missing parts, off color?

 

[leftymills]

Characters are very faint and missing so many parts that I cannot read
the words.

 

[l e o]

Characters are very faint and missing so many parts that I cannot read
the words.

maybe the print head is clogged. clean it.