Clean room – The need for a certified clean room is a bone of contention with many DIY juice-makers, with one side claiming it doesn’t matter as the heat from vaping can burn off any impurities, and the other stressing the need for safe hygienic product. What’s certain is that if you’re selling to a mass market, you need to be strict about hygiene and cleanliness. This is a product that people put in their bodies, so the chance of anything going wrong needs to be minimised. The major juice-makers go for an ISO Certified Clean Room, which Joshua warns can cost mega-bucks! As yet, this isn’t a widespread legal requirement to sell juice but as consumers demand better quality product, not having one can restrict your sales.