So it costs <$> and we will to do our best, but we can't guarantee what they will come out like.
1 Remove surface dirt
Soft brush, or Suede brush on suede.
If you leave bulk dirt on it will turn to mud as soon as you apply cleaner and water, so better to remove at start. Helps prevent scratching, as you wont be rubbing dirt and grit around as you clean.
Put plenty of cleaner on, rub it around with cloth or brush. Gently on softer or delicate leathers. Suede brush is fine on suede.
Wipe the bulk of cleaner off and take a look, if not clean enough go back to step 2.
If they look good, go ahead and rinse off the cleaner with some water and damp cloth.
Wipe dry, using your hands like a squeegee. Then pat dry with clean towel or rags. Hang or stuff with shoe trees, paper or whatever it takes to get them to dry in a sensible non crumbled state. Many shoes can be just sat empty.