So you just walked out of the hair salon with a brand new set of gorgeous hair extensions — and you’re not alone. Millions of women just like you are lengthening their locks every year, and the number of salons offering these extensions has risen an amazing 28.5% in the last two years. But because hair extensions are technically strands of dead hair with no root, they’re much more delicate and prone to damage than your natural locks. As a result, failing to care for your extensions properly will have you replacing them too early. Making sure your sew weave…