Identifying Treated vs. Untreated Leather:
Drop a small amount of water on the leather.
If the water beads up and rolls off, the leather is treated.
Cleaning Treated Leather:
Mix water and a small amount of mild soap.
Dampen a cloth with the solution and gently wipe the sandals.
For tougher stains, use a mixture of water and vinegar.
Cleaning Untreated Leather:
Sprinkle baking soda on the black marks.
Leave it overnight to absorb the oils.
Wipe off the baking soda with a damp cloth.
Cleaning Plastic Sandals
Plastic sandals are generally the easiest to clean and can even be machine-washed.

Washing Machine Method:
Place the sandals in a mesh laundry bag.
Wash on a gentle cycle with cold water and mild detergent.
Using Tea Tree Oil for Stubborn Stains:
Apply a few drops of tea tree oil to a cloth.
Rub the stained areas until the marks are removed.
Cleaning Cork Sandals
Cork sandals, such as those with cork footbeds, need specific cleaning to maintain their longevity.

Step-by-Step Cleaning Process:
Mix warm water with a cork-specific soap.
Apply the soap to a soft-bristle brush.
Gently scrub the cork, being careful not to soak it.
Rinse with cold water and let dry completely.