How do you clean a dirty mattress yourself? Be careful and follow these tips!

What's the best thing to clean a mattress with?

How do you clean a badly dirty mattress?

How can I clean my mattress without a steamer?

How do you clean a mattress without washing it?

How do you get stains and get him clean out of a mattress without washing it?

Does mattress cleaning have to be frequent? dirty mattress after diseases?