Good to know! Mix baking soda with 1 tbsp of fabric softener and spread on mattress every one or two months. Leave on an hour and vacuum off. Kills dust mites and freshens the mattress.
Also to get urine stains out of mattresses:
a measuring cup
8 ounces/237 ml hydrogen peroxide 3% (this can be found in a brown bottle in the first aid aisle of most pharmacies or stores)
3 tablespoons/14.29 grams of baking soda
1 drop of liquid hand dish washing soap
Mix all ingredients into the spray bottle and use within 20 minutes. Do not attempt to store the leftover solution. because it will leak out of the bottle. The mixture only works if you use it immediately, because the cleaning byproducts are active for only a short time period. You should see the stain lift and disappear within 5-10 minutes. Once the mattress dries, if a baking soda film remains, then simply wipe or vacuum it off.