There is no such thing as when to soak your feet to achieve the best results in removing dampness. Soaking feet in warm water alone can not play a role in eliminating dampness, if you need to eliminate dampness, it is recommended to be guided by a doctor.
Foot soaking can dredge the channels and improve the operation of qi and blood, promote blood circulation, accelerate the metabolism, is conducive to eliminating fatigue, it is generally recommended to soak your feet before going to bed. But foot soaking does not have the effect of eliminating dampness, if you want to achieve the purpose of eliminating dampness, you can use drugs under the guidance of the doctor, such as moxa leaves, snakeskin, and so on. But the role of the drug foot soak to dispel dampness is limited.
General soaking time should not be too long, control in half an hour or so, appropriate supplemental water, to avoid increased sweating in the body in a state of dehydration, but also to control the water temperature, to avoid overheating leading to burns.