Homebrew PCBs

I spent the last hour reviewing old threads about tt and have a question about making component pads thicker using Eagle.  The process I use is design the board using Eagle and print the board on Staples Basic Photo paper.  I prepare my copper board using a kitchen scratching pad, then rinse and dry.  I actually use a iron used for ironing monocoat on airplanes.  It heats up well over 300 degrees and it is easier to see where you are ironing. I iron for around 4 to 5 minutes, cool the board with cold water and peel the paper off.  The paper comes off with minimal effort under running water. Usually the board looks very good, except for the fact that I lose about 10 percent of the pads. I get a half moon on the pad, but not good crisp circles.  I think the thickness of the pads is too small.  What I would like to do is to make the pads thicker (Between the hole and outer edge, sorry I don't know the terminology). What is the best way to make the pads bigger (Thicker)  Thanks.  Carroll