Good solution to cure fret sprout before it starts?

[Nick Sorenson]

Originally Posted by Tim Bishop

Maintaining the proper humidity level where you keep your instruments is key. In the winter I run a humidifier at approx. 47%. I've never had a problem with "fret sprout".

In theory that's the best answer (especially for a Luthier to have in his back pocket)! But what about for a small builder who knows that most people won't do that? This is something I hear about every winter at least a few times for guitars I built in the summer and boy is it a pain trying to explain this to the customer.