Each spring and fall I deep clean all our mattresses using this little combo of baking powder and lavender. Ideally scented oil would work best but I don’t like the smell to linger too much.
While what seems to be loads and loads of sheets, blankets and mattress pads get washed I sprinkle this all over the mattresses and allow it to set for at least a few hours.
The baking soda helps draw out moisture and freshen the mattress up. I simply plop my vacuum on top of the mattress and vacuum up the powder and heaven knows what else.
It’s truly amazing at all the uses a $.50 box of soda can do for you.