The hack Using eyeshadow to disguise thinning hair, or define your hairline. The test This is an issue I’m all too familiar with. My hair has been getting finer ever since I was diagnosed with polycystic ovary syndrome as a teenager, and it’s probably the thing I’m most self-conscious about. I already use Colour Wow Root Cover Up (£29.50) to hide the parts of my scalp I feel are most visible, so could this hack be a cheaper alternative? I...