Help My Cactus?
Your cactus is a grafted cactus if you search them or google them you may find a solution. Sometimes the top part dies and your left with the bottom part it was grafted or glued to. Is it still humping along or is it dead by now?
Permanent Marker on a Wood Table?
My grandson wrote with permanent marker on my wall and I used hand sanitizer and it came right off. Maybe it will work for you.