After playing soccer on muddy pitches, are there any recommendable ways of getting rid of the mud stuck between the studs and generally on the shoes/boots/trainers/sneakers?
Easiest way to get rid of the mud from bottom of the shoe is to let the mud dry, then beat your shoes on some hard surface, all the stuck mud will be removed.
After that, you can remove the lace and rinse it in warm water and thereafter clean the shoes with the paper towel.
The UK TV show 'Dragon's den' featured an invention by a 15-year-old schoolboy, which is now just coming to market, with the support of an almost unprecedented three of the 'Dragons' from the show.
Boot Buddy was designed specifically for the task you describe.
Failing that, the old standard solution of a hosepipe or outdoor tap [faucet] & a scrubbing brush has worked for many people for many years.
For those who don't know the show
Dragon's Den has a panel of 5 highly successful businessmen & women, known as the Dragons [not least for their ferocity in grilling less-capable candidates], who invite potential new inventors & business startups to make their case for investment into their company. The Dragons invest their own money & time in the successful applicants' businesses, & of course, share in the rewards if the business grows.
The show has actually turned out some extremely successful, multi-million pound businesses in its 16-year lifespan.
I understand Canada also has a version of the show & it was also re-named to Shark Tank for a US version, so it may be better-known than I originally thought.
If you aren't looking for perfectly clean shoes, just walk through a shallow puddle (or embrace your inner child, and splash around). The water very quickly rinses off the mud, and you can do it in shallow water that won't leave your shoes soaking wet. This is most easily done when the mud is still wet.