Quote Originally Posted by Halloamey View Post
Mist regularly, once or twice a day but make sure it dries up atleat a few hours before night. But shrivelling pseudobulbs can be an indication of root rot, might be good to check the roots. Upload a pic, and we can help you better.
I agree with Amey. Check the roots ASAP.

And not that this is always the case, but once a p-bulb is shriveled (drained of nutrients and water), it usually doesn't come back. The new growth will look correct though if roots are not damaged and correct water, air-movement, fertilize, and drainage is provided.

cheers,
BD