Clipperblade marks

Question
I'm just starting to groom need help.  I noticed on some dogs when I'm clipping I leave clipper blade marks on some dogs. I've tried clipping different directions but still leave blade marks on the dogs coat. HELP! what am I doing wrong.  Thanks

Answer
Hi Vicky,
I am going to send you to a website you're gonna love! Newbies get loads of help here but learn to use the site.
http://www.petgroomerforums.com/chat/forum.php

sign up then look up past answers in the area you are having problems with. There could be so many different answers to your question I don't even know where to begin but this a subject that has been hashed out many times amongst us old timers.
Have fun and good luck!