How to shape moss ball round?

This issue was talked about in the Moss Ball care guide and Q&A article.

My moss ball not round anymore, why and what should I do?

It got squeezed in tank - cause a lot of them grow together. Or during shipping. Either 1. Roll it with hands. Or 2.Tight it up firmly as above for couple of weeks.

Here is how:

Roll it round gently until round.

Let it shape by itself in round for a few hours  

Put it back in water  

You: ??? 

Me: Yea yea. Just roll it.