"Just Add ice" orchid dying?

[Pinkster]

Ive never had an orchid before and saw the Just Add Ice Orchids at walmart. After reading about them on here I am embarrassed

I have cherished this plant since I got it. Its beautiful and am in love with it!

The roots turned a little gray-brown on the ends, so I clipped 'em. I don't know if that was the right thing to do. Its weird because I hear if they are that color they need water. but I think there is a little white mold on the roots...so I am totally unsure. It has SO many beautiful buds that I know are probably gonners

It was snowing when I bought it and to make matters worse walmart has them right next to the front entry....and its VERY cold with a hot draft as the have heaters right there.

Ive had it about a week and only watered it once with the cubes.

I am adding some pics in a moment.