The white powdering like items that cause a layer of frog separation is easy to deal with and goes away quite easily with removal as new frog replaces it. It's the nasty smelling, dark, gooey thrush that makes for the most problems.
Rinse with vinegar after picking out the foot and having any thrush exposed, picked out and exposed to the air.
It's good that you're taking the tlime to notice and making the effort to clean it out. Thrush is pretty easily treated and kept at bay if you check regulary. To ofter people don't take the time and effort to pick on the fron and find if there is any until it's already established. But even then it's treatable.