or serum is the best product to weigh down curls so you can achieve a slick, straight style.Who should use straightening balm: Those who blow-dry their curls or waves straight.How much straightening balm should you use: Start out with a ping-pong ball???size amount; use more if hair is thick.How to use straightening balm: Smooth onto your strands starting an inch from the roots; applying it any cl