Neither of these approaches is a good idea Bleach is very irritating and has very little if any residual action  Baking soda is useless   for self help there are a lot of other things you can do vacuuming  steam treatment some steamers are very reasonable in price handhelds are USELESS  DE used carefully in outlets and cracks and crevices not as a dust everywhere not good for anyone buy some leg protectors and matress and box spring encasements and get a good professional firm to do the heavy duty stuff