I have Raynaud's which causes loss of circulation in my fingertips even when the weather isn't that cold (so even in a car with the heat on). Then this happens, touch screens do not register correctly, and I end up having to use a knuckle or do what my sister does and use the tip of the nose

While still available I'd recommend getting a galaxy s / note from lateryear with the stylus.

Response time, accuracy etc near perfect.

Hope it helps