AH the factors, such as the temperature of the water and the articles (or persons) concerned, must be correlated, but as a general guide, washing by hand suggests that you should refrain from getting involved.
in the personal affairs of others at the present time; washing in a machine indicates an unexpected vacation or change of location.
To dream of washing your hands and/or face predicts a pleasant new friendship in the offing.
[1]Clean up your act; cleansing, purification of emotions.
[2]