If your pet bed has a foam insert, it’s best to wash this by hand as the foam can deteriorate in the washing machine. The easiest way to do this is by partially filling your bathtub with warm water and some detergent. Add the foam insert and continuously submerge until you think it is clean, then squeeze it as hard as you can to remove excess water. If the water runs clear, this indicates that the insert is clean. If the water is dirty, repeat until it runs clear, then pop in the sun to air dry.