If your feet are itchy, it's likely because your feet aren't getting enough air. Try switching to a more breathable set of shoes or sandals. Avoid wearing the same set of shoes two days in a row, and don't wear nylon socks. Take your socks and shoes off when you get home to let your feet get some air. If you have any antifungal powder, sprinkle some in your shoes to see if they stop itching.