My Grandma crochet a ton of blankets for our whole family using the classic Granny Square Pattern. I own one of them, its on my sofa and it reminds me of her every day.

One Square was so much damaged I had to exchange it. Onother part was loose, so I fixed this strained corner as well.

Cut out the damaged Square, crochet a new one with yarn left overs (so good to use this!) and crochet it back inside as ist was before. I had to get the thread through the outside loops, which was a bit tricky.

I am very happy with the result.