Grass-stained kit too?
Getting the green out of shirts and shorts before the next wash.
Read about grass stainsWet boots by the back door and a session tomorrow is a very ordinary evening.
This page gives you a clean-then-dry timetable for a school night, a list of what to keep the boots away from and a fallback for the morning if they are still damp.
To dry wet football boots overnight, knock off the mud, take out the insoles, stuff the boots loosely with newspaper and leave them to air-dry indoors, away from direct sunlight, hair dryers and tumble dryers, because heat damages the materials (Nike). Change the paper when it is wet. Never dry boots on or against an electric heater, because the fire service says never to use heaters for drying clothes (London Fire Brigade) (Merseyside Fire & Rescue). Boots should be fully dry before they are worn again (Nike). No one has tested these methods on children's boots, so the timetable is my own.
I once put a pair on the radiator "just for an hour" and found them curled like crisps.

Three checkpoints
The timetable has three checkpoints: when the boots come off, at bedtime and in the morning. It is my own, built on the air-dry and newspaper advice in Nike's boot care guide.
At the door. Knock the boots together outside and scrape or brush off the worst of the mud before it dries hard. Wet mud comes off far more easily than dry mud.
Strip. Take out the insoles and loosen the laces (Nike). Laces are air-dry only (Nike).
Stuff. Fill each boot loosely with newspaper, which absorbs moisture and keeps the shape (Nike). Do not pack it tight.
Place. Stand them indoors on a surface, in a room where air moves, away from sun and heaters (Nike).
Change the paper. At bedtime, swap the wet paper for dry. If the paper is soaked sooner, change it sooner. The timing is my own judgement.
Check in the morning. Do the finger test in the morning check below before the boots go in the bag.

No source gives a drying time. How long it takes depends on the boot and the room, so the check in the morning matters more than any number of hours.
Each ban has a reason
Parents' threads and some boot blogs recommend radiators, hair dryers and even the freezer. The manufacturer says heat damages the materials and the fire service says never to use heaters for drying clothes. The table below follows those two.
| Do not | Why | Source |
|---|---|---|
| Use a hair dryer or tumble dryer | Heat damages the materials. | (Nike) |
| Leave them in direct sun | Same reason: heat damages the materials. | (Nike) |
| Put them on or against an electric heater | Fire services say never to use heaters for drying clothes and never to dry clothes close to a heater or open fire. Neither mentions boots, so applying the line to wet footwear is my own judgement. | (London Fire Brigade) (Merseyside Fire & Rescue) |
| Put them in a washing machine | Washing machines can damage boots. Check the maker's label. | (Nike) |
| Pack them tight or store them damp | Boots should be fully dry before they are worn again or stored in a bag. | (Nike) |
Central-heating radiators are the awkward one. No source on fire risk for boots on a radiator turned up, so boots stay off them for the manufacturer's materials reason.
Dry boots, happier feet
The NHS advice on athlete's foot says not to wear shoes that make your feet hot and sweaty, not to wear the same shoes more than 2 to 3 days in a row and to dab feet dry, especially between the toes (NHS). A damp boot is the opposite of that.
That advice is general. It is not about children or football boots, so it only explains why starting a session in a wet boot is a poor idea.
If your child plays most days, a second pair to rotate is the easy answer. For what to buy, start with the fit and the surface.
Do the finger test
I've sent a child out in boots that felt dry on the outside and found out at half-time that the toe was still wet.
So check properly. Push a hand into the toe, feel the tongue and the lining and have a sniff. If it is cold or damp, the boots are not dry.

If they are still damp, work down this ladder: a second pair, dry trainers for a casual kick-about, a thick dry sock or skipping the muddy session. Do not reach for a heater to hurry them up.
For cold feet on a wet morning, read about cold-weather football. A child who plays in the mud again tomorrow will soak the boots anyway, so the goal is dry at the start.
What is known and what is not
Air-dry boots indoors away from sun, hair dryers and tumble dryers, stuff them with newspaper, take the insoles out and make sure they are fully dry before they are worn again, and keep them out of the washing machine. That is Nike's boot care guide.
Never use heaters for drying clothes. That is London Fire Brigade's heating advice and Merseyside Fire & Rescue's heating page.
Avoid hot, sweaty shoes and rotate your shoes. That is the NHS page on athlete's foot.
The drying advice comes from one manufacturer's care guide and the fire advice is about clothes, not boots. None of these sources is a test of how fast a method works, and none is about children. The timetable here is my own. Leather and synthetic boots may behave differently, so check the maker's label. The paper-changing times are my own judgement.
Quick answers
Knock off the mud, take out the insoles, stuff loosely with newspaper and air-dry indoors, because heat damages the materials (Nike). There is no safe quick method that uses heat.
The manufacturer says to keep boots away from direct sun, hair dryers and tumble dryers because heat damages the materials (Nike). Keep them off heaters altogether.
No. Nike says to avoid hair dryers (Nike).
No. Nike says washing machines can damage boots (Nike). Check the maker's label first.
No source says. It depends on the boot and the room, so check the toe by hand.
Use a second pair or dry trainers. Do not use a heater to hurry them.
Keep going
Three places to go next, depending on what is still wet or muddy.
Getting the green out of shirts and shorts before the next wash.
Read about grass stainsKeeping a wet, muddy session fun and the clean-up short.
Read about muddy footballAstro or firm-ground, and how to check fit.
Read about choosing bootsTonight's five minutes
Do the first four steps as soon as the boots come off, change the paper at bedtime and check the toe in the morning.