You use the cream from the pharmacy, the itching stops, and a month later it is back. If that sounds familiar, you are probably only treating half of the problem. Athlete's foot lives on your skin, but the warm, damp inside of the shoes you pull on every morning is the environment it thrives in.
We build machines that dry and freshen the inside of footwear, and this is the step people miss most often. Here is how it works, what you can do yourself, and where household hygiene ends and a pharmacist or GP takes over.
What athlete's foot actually is
Athlete's foot is a common fungal skin condition. It likes exactly the conditions that build up inside a closed shoe: warm, dark and damp. Feet release a surprising amount of moisture over a day, and a trainer or safety boot will not get rid of that overnight on its own.
The main types
- 🦶 Between the toes. The classic version: soft, white skin and small splits, usually between the fourth and fifth toe.
- 🦶 Moccasin type. Dry, flaking skin across the sole and sides of the foot. Often mistaken for ordinary dry skin.
- 🦶 Blister type. Small itchy blisters on the instep or arch.
- 🦶 Nail infection. Thickened, discoloured nails, often after a skin infection has been left to run on.
Spotting it early
Early on it is subtle: mild itching once your shoes come off, a small flaking edge, skin between the toes that stays white. That is the easiest stage to deal with, and also the easiest to ignore. If you are unsure whether it is fungal or just dry skin, or if it does not clear up, get it looked at by a pharmacist or your GP. We sell dryers, not medicine, and this article is not medical advice.
Why your footwear is the missing piece
Treating the skin is one thing, but every morning you step back into the same environment. Spores can sit in the fibres of the lining and in the foam of the insole. If that inside stays damp day after day, the conditions for reinfection stay in place.
That explains a few things people ask us all the time:
- "It never fully goes away." The feet get treated, the shoes do not.
- "Only my right foot." Usually the boot that ventilates worst, or the pair worn most often.
- "It returns every autumn." Closed shoes, less drying time, more moisture.
A routine that works
- ✅ Rotate your shoes. Never two days in a row in the same pair. A shoe needs roughly a day to dry out from the inside in open air.
- ✅ Dry between your toes properly, with a separate towel.
- ✅ Wear breathable socks and change them daily, washing them at the highest temperature the label allows.
- ✅ Take the insoles out after a heavy day or a session so the shoe dries faster.
- ✅ Clean the inside regularly. Material by material, we cover it in how to disinfect shoes.
- ❌ Never put wet shoes on a radiator. Glue and leather suffer, and the outside dries long before the inside does.
- ❌ Do not walk barefoot in shared changing rooms and showers.
What a shoe dryer does and does not do
Let us be honest about this: a dryer is not a treatment and does nothing for your skin. What it does is get the inside of the shoe properly dry, which removes the damp conditions the problem feeds on.
The Shoefresh Opod (€129) pushes air at body temperature through the shoe and adds ozone, which tackles odour and dirt in the lining. It is done in about an hour, so shoes you put in at night are dry in the morning. The Opod Detect (€179) measures the moisture inside and stops on its own, useful if your footwear varies a lot in material. For smaller sizes and children's shoes there is the Opod Mini (€79). If you only want drying, the ShoeDry Airo is a cheaper option with warm air and a timer, and nothing else.
A word on UV dryers. UV only acts on the surfaces the light directly reaches, and inside a shoe that is a small fraction of the area. On poorly built devices UV light is also a genuine risk to eyes and skin. Focus on drying and airflow instead.
What about antifungal shoe sprays?
Sprays sold for footwear can help as part of a routine, following the instructions on the pack. What they cannot do is work through a soaking wet lining, so use them on a shoe that is already dry, not as a substitute for drying it. The same goes for deodorising sprays, which mask odour rather than remove the cause.
Frequently asked questions
Can I put my shoes in the washing machine? Some textile trainers survive a cold, short cycle in a laundry bag. Leather, work boots and heavily glued shoes do not. See shoes in the washing machine.
Does freezing shoes help? No. It masks odour briefly, and the shoes come out damp, so you still need to dry them.
Do I need to throw the shoes away? Usually not. Cleaning, new insoles and consistent drying is enough for most pairs. Old, repeatedly soaked sports shoes are worth replacing.
Is it contagious at home? It can pass on via floors, bath mats and shared towels. Separate towels, your own bathroom slippers and washing the bath mat regularly go a long way.
I train five times a week, what should I change? Mostly routine: clean socks every session, dry the shoes afterwards and rotate two pairs. Our guide on sweaty feet goes into more detail.