I bought this about 6 months ago and have been putting off using it as it was the first time I'd ever used a chemical to voluntarily dissolve stuff round my town halls, among other places. I had the 'What if my skin is more sensitive than everyone elses?' everyone reacts differently...' but due to the heat wave I thought if there's ever a time to test it, it's to try to help my 'Betty Swollocks' it's time to put my big boy pants on. Military operation. Rubber gloves (had to wait until the house was empty) the cooker timer and a couple of the cleanest, softest towels I could find. The rubber gloves were there as I was worried the stuff might knacker (!) my fingernails, as they are made of Keratin too, so the seven p's 'Proper Prior Planning Prevents Piss Poor Performance'. I have quite thick coarse hair, so set the timer for 7 minutes. After ensuring I had plenty of elbow room in the bathroom, and the washing machine/dishwasher were off so full power to the shower, I started whacking the stuff on. Gave it a reasonable smear, like butter on toast on my shoulders, but when it came to my meat n' two veg I was spreading it thin like Marmite. Probably took me 2-3 mins to get as much coverage of my shoulders, back, sack and crack as I could, then I elbowed the cooker timer to start. Quite a few reviews have commented on a strong chemical smell, I didn't find that, not as strong as the smell of a normal shower gel in the bathroom, though I did have the window open a bi, in case the emergency services had to come in with HAZMAT gear. Seven minutes later I leapt like a salmon into the shower and punched it to warp speed, grabbed a Loofah, and after wetting it wiped the top of my left shoulder and arm to find not a single hair. That was great, but of secondary importance. went for the tallywhacker, and same result! Although I'd scrimped a bit when it came to that area, I just kept rinsing this 'sludge' of dissolving hair, and rinsing (VERY) thoroughly with tepid/warm water. Also worried about my Taint and Rusty Sheriffs Badge, I squatted, sprayed, prayed and wiped and.... result! Kept cleaning/wiping with medium pressure for about ten minutes (sorry, Southern Water) and switched to a sponge and shower gel and all good. Dried everything North of my belly button as per, and patted everything South like a newborn baby kitten. After stepping out of the shower, I did feel a little mild tingling, but having been very thorough with the rinse, I knew it wasn't residual Nad's on my Nad's so slipped on some soft cotton shorts (sans boxers) and had an inspection in the mirror. Good first effort, though missed quite a few small patches on my back, and could maybe have applied a little more to my gonads, I think it'll get easier with practice and some shoulder stretches before the next application. I would DEFINITELY suggest NOT going to the gym or out in the sun on the day of application. I am relieved to have have broken my duck and not my dick, and perhaps the day after tomorrow will try and get the bits I missed with a targeted application, so it's all (reasonably) uniform and will need reapplying at the same time. As for the 'right' amount to apply... I'm 6ft 3 and 24" shoulder to shoulder and I'd say I used about 1/4 of a tube in total, on the tops of my arms, shoulders, back (or most of it), arse (cheeks) and 'landing gear'. Still deciding what to do about the chest... Very good product.