The general rule of thumb with fake tan is that it’s brilliant if you can’t detect its presence, that a good one will do the job without betraying a whisper of its existence via scent or telltale lines or a tangerine hue.
Despite all the many products on the market and the lofty promises on the packaging, I haven’t come across many such lotions/mists/creams/gels in my life, all of them either immediately or over time making themselves known one way or another.
