Should I discard shoes I wore while I had athlete’s foot?

Not necessary. Use lysol spray and let the shoes dry over night.
No. If your shoe is significantly soiled, was immersed in water or covered in a chemical that prevents breathability, i would recommend discarding the shoe, otherwise, treating the shoe with and antifungal powder can often be effective in preventing reoccurance.
No. That is not necessary. But you should have the shoes disinfected with an antifungal solution or spray. These are often available at pharmacies or from podiatrist offices.

Related Questions

How can I get rid of my chronic athletes foot? I always wear socks and wash my shoes regularly, but it seems particularly bad in my work flats

Change shoes and tx. Get rid of problematic footwear - otherwise wash all laces , soles and footwear in bleach - color safe - if it survives the wash, great - if it doesn't, sorry. Use Lamisil (terbinafine) cream twice daily for two weeks and repeat the wash also sun dry it after the dryer for a few hours. Read more...
Medication. You have taken the proper steps with good hygeine. You should use a daily antifungal spray or powder, but an oral antifungul for a short period my be the answer. Read more...

What is the best solution to get rid of athletes foot? Do I have to spray my shoes?

Several things. If you have been wearing shoes without sock and you have athletes foot it would be best to spray your shoes with an antifungal and let them dry overnight. You need good hygeine for your feet and need to use an antifungal on your skin to help rid of the fungus and prevent return. Read more...
Start with the skin. The skin needs to be treated with a topical antifungal cream. Keep you feet dry with the use of powders, socks which wick perspiration away from the skin. Shoes shouldn't be worn two days in a row and should be allowed to dry out between uses. There are sprays and even a shoe tree that uses uv light to kill fungus. Read more...

Have you seen athletes foot on babys less than 1 year? My 9M has redness only between the big toes. He usually wears socks but shoes too sometimes.

Fungal infection. Apply lotrimin (clotrimazole) and keep without socks so it airs out. Read more...
Might be. Could be. Usually this is inside the smallest toe. Could be fungus or something else. No harm in application of AZOL:E cream----- miconazole, clotrimazole, ketoconaziole. Ventillate feet: barefoot in home, no sox in bed. Read more...