"The first year I went for two-and-a-half weeks – most people go for between two to four weeks – and my skin was totally clear by the time I'd left, for the first time since I was 13. I've been back every year in May since – you can only go during May or September when the weather isn't too cold or hot." A typical day involves a 15-minute bathe in the Dead Sea first thing, then alternating between lying in the sun and shade from 7.30am to 12pm and then again from 2.30pm until 6pm, when there's another 15-minute bathe. Jessica doesn't wear any sunscreen (more on the serious risks of this later), only oil, for the whole holiday in the 40C heat, so has to be careful not to get heatstroke.