SOPP338: Fixing keys in digital organs

This question was sent by Estella. And he writes: My dear Vidas, I have subscribed to your organ blog and it has helped answer some questions about improving my organ skills, thank you. I have a question about the Allen Chapel organ, which is the one that I use at my church. Last year one of the keys on the Great Manual started clicking or clacking (G). After calling a repairman and 500.00, it was repaired. Just recently, the B flat key has started making the same sound. I don't think our church will be willing to spend any more money. Do you know a quick or inexpensive way that it can be fixed? Hope you can help, Estella