I have recently noticed some odd behavior with my feather duster. It hadn't come out for about a week and then it only came out half way. I moved the rock around because I thought maybe it was being smashed. However, it wasn't. It had connected itself to the rock so I couldn't even move it. Also the stem had lost its color and is now kind of transparent. I think I am adding all the necessary chemicals, so I can't think of anything else to do. Any suggestions?