Thanks for the tips. I hadn't tried Kroil or WD40 yet but am now. Letting the top soak in Kroil for a couple hours and then I'll try again. I did open the top cap. I didn't put a lot of muscle into trying to open the first time. It really doesn't look like it is threaded and I didn't want to break anything or ruin the razor so I kind of twisted easy with the same force I'd use to open any Gillette 3 piece. This is the only one of these I have so if I ruin it, I don't have another one to replace it.