Answer by  
                                                                                          fiona (208)
                                                            
                          
                          
                                                          Maybe you need to wash them more. Certain types of bacteria can have a vinegar smell, so you might need to see a dermatologist or a podiatrist to have this issue taken care of. Or you can start by getting a pedicure, buying new shoes and cotton socks, and keeping your feet clean.