Block a garment

[Jane9898]

Some says blocking is very important, some says it's not a Big deal, so do you actually block each n everyone of them? With some kind of special wool liquid?

The yarns I bought stated machine washable - does it mean I can use detergent, color bleach and spinning in the washing machine? How about delicate spin on the dryer? Or should I hang flat for dry?

What to do with kiddos split of food or milk or juice...it's so common, but what should I do?

Any of your contribution is very much appreciated

Thank you very much