Socks are worn on your feet and held in your shoes, representing external interference factors that affect your decision-making. Although it exists, it is not easy to be seen by others.
A few of them are just dirty, indicating that something influenced by others has happened.
To wash is to get rid of these invisible shackles inside.
In fact, dreams are not necessarily related to reality, but a deformed transformation form of the inner subconscious. Believe it or not. Actually, it doesn't matter much, but I'm a little confused.
I hope the above explanation will help you a little. If not, just entertain yourself. Oh, good luck!