I can't see how this would work. Salt seems much more hygroscopic to me, and if the rice was actually asbording a meaningful amount of moisture you'd have it s

I can't see how this would work. Salt seems much more hygroscopic to me, and if the rice was actually asbording a meaningful amount of moisture you'd have it spoiling. If anything I'd bet the salt is keeping the rice dry. Not to mention the open container design salt shakers inherently share which would imply a rather limited lifetime of the kernels. I'm fairly certain this has to be primary a mechanical mechanism, if it even works at all. I recall plenty of salt shakers at airbnbs or whatnot that were quite soggy regardless of the amount of rice inside the shaker.