I have 2 clients who don't give me their hand and they were both booked in today!!! They place their hand on my rolled up towel and its in the correct position to work on, but as soon as I begin, they start to pull away and raise their hand and finger up towards them so they can see!!! So annoying - I've joked with them both about it, explaining that I need to see what I'm doing and they just need to see the finished result but they still do it. It's getting to the point where I'm giving up nearly, and just "do what I can" but the result isn't very professional looking. Does anyone else have this problem, if so how to be forceful but polite and professional please?