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.
9 Easy Crochet Dishcloth Patterns (Beginner Friendly) - Daisy Cottage Designs
Whispering Pines Dishcloth - Free Crochet Pattern - Truly Crochet
Round Crochet Dishcloth Pattern
2 Crochet Dishcloth Patterns + What's the Best Dishcloth Yarn to Use?
Simple and Practical Dish Cloth Crochet Pattern - Stitch11
Crochet Washcloth Pattern - Beginner Friendly and Free - Leelee Knits
10 Easy Dishcloth Free Crochet Patterns — Blog.NobleKnits
The Absolute Best Yarn for Crochet Dishcloths + Free Patterns - OkieGirlBling'n'Things
25 Modern and Stylish Crochet Dishcloth Free Patterns - Little World of Whimsy
Best Free Patterns for Crochet Dishcloths
Free Rustic Cotton Dishcloth Pattern