When I print a crochet pattern off the internet or copy one from a pattern book, I always insert it into a plastic sleeve.  

By doing this it not only protects the pattern, I can also use a dry erase marker to keep track of where I am and make any

other notations I would like.  When I am finish, I remove the clean pattern and file it and then take glass cleaner and a paper towel

and wipe the plastic sleeve off and put it up for the next time I need one.

Until next time, keep those hooks flying.