help! w/ saving Grammatophylum scriptum 'Leopard'

[sustainabledee]

The last maybe 2 months the grammatophylum has been declining and I don't know why or what to do.

history:
I purchased a gorgeous grammatophylum from a botanical garden and it was doing famously for maybe 6 month at home. After flowering, I took it out of the pot (it is a mass of roots) and left it open (no pot/media) to the air and it grew 3 more sets of leaves

I water deeply 1x per week and mist maybe every few days. I live in New England and the plant sits near a south-eastern facing window.

There's a sap-like crystal formation that is under some of the leaves since I got the plant. I rinsed the sugar-like substance off a couple times.

The last 2 months the psuedobulbs shriveled and haven't plumped back up. The leaves have been dying one by one - turning yellow with brown spots and then dropping off.

Could I be over watering? Does it have a disease? Any suggestions on how to figure this out and improve it's life quality would be so great!

Thank you

[estación seca]

Welcome to the Orchid Board!

What are your ambient temperatures and humidity?

Does it get only natural light?

These are very high water use orchids. I don't think it would do well out of a pot except in a very humid greenhouse with daily watering.

They also prefer warm to hot temperatures. Natural New England light is probably not enough.

They normally produce a basket of upright roots.

I suggest repotting it to a pot somewhat larger than previous. Keep it always moist. Keep it as warm and humid as you can.