Wrinkly leaves on phalaenopsis

[louisetee]

Hi all.

I repotted a baby orchid about a month ago in bark medium. Previously it was in bark and sphagnum moss medium.

I noticed the bottom leaves are becoming wrinkly and shriveling. I have attached a picture for your reference.

The orchid is watered once a week or twice, depending on the weather. Although I live in Malaysia, where am I gets very hot to the point the plants get dried out. The orchid is also misted occasionally.