Orchid related questions, answered by AOS experts.
Note the specific times below if you wish to watch or listen to those topics.

07:13  Sanitation when coming indoors from outdoors
11:38 Semicircular patterns on leaves
14:44 Cymbidiums moving into new growing conditions
17:51 and 49:05 Phragmipedium leaf tip dieback 
22:36 Paphiopedilum rothschildianum when should they bloom
27:40 Horticultural oil using against ants 
32:03 Dendrobium new growth leaf shriveling
33:40 Putting your plants outside in shade without cover
35:23 Lycaste when to repot
37:07 Paphiopedilum not blooming (light levels)
39:37 and 56:14  Leaf damage   bugs or bacteria?
40:54 Growing in baskets
44:25 Grammatocymbidium healing from cold damage