A ballroom dancer's shoes are one of her most important accessories, and by taking proper care of them, you can significantly lengthen their life. Social ballroom dancing shoes are typically black, while competition shoes are flesh coloured---which lengthens the line of the leg---and it's also common for shoes to be dyed to match the colour of a ballroom dancing dress.
Slip a plastic heel cap over the heel of your shoe. When the plastic has worn down, you simply replace it.
Spray shoes with a fabric-protectant spray. This is especially important if you have dyed your shoes.
Wear your shoes in the studio only, and change into street shoes before you leave. Never wear satin shoes in the rain.
Mix 1 cup of warm water with 1/2 tbsp delicate hand-washing detergent in a small mixing bowl.
Saturate a sponge in the soapy mixture and squeeze out the excess water. Dab the uppers of the shoes until clean. Rinse the sponge and then clean the soles, working from the back to the front.
Let the shoes dry overnight naturally.
Direct sunlight and hair dryers can damage the delicate satin, so let shoes dry naturally, and never put them in the dryer.