I love the beautiful waves/curls you get with rollers more than a curling iron. It is in fact my favourite way to get pretty voluminous hair and I dare say they look the most natural! The only problem is that they don't last long on my thin, way too straight hair! So to make them last longer you don't need any special hairspray or "miracle" product, you just need a little bit of patience.
-I begin by putting the rollers on my dry hair, play around with sizes depending on the look you want.
-I then wet my hair with the rollers on my head, I know it sounds so wierd but this is the key to the long lasting bit!
-It is best to let the hair naturally airdry, but you can also use a blowdryer. It depends on the time you have, but I prefer to let mine airdry to avoid damage from the heat.
- Take off the rollers and spray them with hairspray if you want to, play around with them and the fun part, decinding how you want your hair up, down, messy bun etc.
P.S. You can try this with boiled hot rollers. They are a special cheaper kind which you boil. So you'll boil them, put the rollers on, wait for the rollers to cool down and after that wet and dry hair.