Hands down Cotton yarn is the best yarn for Crochet Dishcloths! I also have linked a few of my favorite cotton yarns in this post.
Dishcloth Crochet for the Absolute Beginner - Fast and Easy Tutorial
Mr. Micawber's Recipe for Happiness: Squiggledy Dishcloth Free Pattern & Tutorial - an Easy Intro to Slip Stitch Crochet
Top 20 Free Easy Crochet Dishcloth Patterns You'll Love - Easy Crochet Patterns
Cottage Dishcloth Crochet Pattern
50 Free and Easy Crochet Dishcloth Patterns - Stitch11
2 Crochet Dishcloth Patterns + What's the Best Dishcloth Yarn to Use?
10 Easy Dishcloth Free Crochet Patterns — Blog.NobleKnits
Free Rustic Cotton Dishcloth Pattern
The Absolute Best Yarn for Crochet Dishcloths + Free Patterns - OkieGirlBling'n'Things
Sweet Honey Crochet Dishcloths Free Patterns - Your Crochet
Textured Crochet Dishcloth (Free Pattern) - love. life. yarn.
5 Tips for Making the Best Crochet Dishcloths - Maria's Blue Crayon
Quick & Easy Crochet Dishcloth Pattern {FREE}
25 Free Crochet Washcloth Patterns (Easy PDF Pattern)
Handmade Haven: 10 Free Textured Crochet Dishcloth Patterns You Can't-Miss! - love. life. yarn.