It could stain your carpet too.
I use a pointing trowel - just scrape it slightly on the tilt along the joint.
I'm with you on this Mrs K, but a bigger pic would help.
Christmas cactuses last forever - my sister and I have family heirlooms.
DD, if it feels so much like you're having to balance you should probably let someone else have a go. A job like that demands that your work position is rock solid.
I was going for G. macrorrhizum too - it would look good there.
What size area do you wish to cover?
If I could chuck a stone in this pond, it's possible that the tree/ivy/nest might be being used as a roost.
Put a small amount of it in water - the reaction might tell you something (either positive or negative).
You should always get the permission of the owner.
The longer you leave it, the more nutrients will return to the soil, which is not what you want. So strim or mow it now and rake off all the dead matter for composting.