i agree with Michelle- these rollers are very important when it comes to timing. Don't leave them on the steamer too long- it'll make them too wet. Don't take them out too soon- the hair won't have time to set.
When I used these many years ago I hated them too. I purchased them again just about two years ago and now I think they are the BEST.
Here's the difference; the old set said that the rollers should be left on the steamer for about 30 secs to one min. Wayyyyy too much water for my hair. The new ones say to set the roller on the steamer for up to 15 secs. I consistently steam for about 3-5 secs depending on the length and thickness of the section of hair I want to curl.
The old set said to remove the rollers way to soon for my hair to set. I leave them in now for 15-20 mins while I'm off doing other get ready things- make up, ironing, breakfast.
If I use them when I have air dried my hair the look is totally different from blow dried or flat ironed hair. Its still nice and curly, but not as smooth.
Lastly, I always have some product already on my hair like mousse, gel, hair spray or what ever- before putting in the rollers. For example, when I flat iron I use mousse and some shine enhancer, so the next day when I use the rollers these products are already on my hair. Maybe this helps to prevent some frizz and may help hold the curl longer. I will also add a little more mousse when I need the curls to be really crisp for an evening out or dress up.
Hope this helps.