Welcome to the forum Uechi!!
We certainly welcome questions. There are a lot of people here with a lot of very valuable information, and they give it to us for free.
Couple of questions for you.
What kind of orchids do you have?
Do you have any pictures of them?
Also, if you would go to your user profile and update your location it will be helpful when any member wants to give advice. We are from all over the world, with a wide variety of growing conditions, so to give accurate advice we will need to know a little about your growing conditions.
Glad to have you here, hope you enjoy your stay.