I see mealy bugs in that last photo too so they do need to be eradicated. I also think you should un-pot your Jade and check the roots. Watering twice a week seems excessive at this time of year but the location of the plant so near the heat of the radiator may very well be drying the plant out entirely too quickly. Here's a short article that might be helpful: http://www.blogsmonroe.com/gar...
~ I'm an old gal who still loves playing in the dirt!
~ Playing in the dirt is my therapy ... and I'm in therapy a lot!
