None of the above :P

I use a premium plastisol for my handpours. There are several manufacturers of plastisol for worms. But, there are only 3 that are worth spending any money on.

There are some large commercial companies that use 3G plastisol. They use it because it's the cheapest. Especially when you buy by the 55 Gal drum. It also has the worst properties, especailly the smell!!!!

I don't have to add anything to my plastic when I cook it. I do add a mild scent to each bag before I ship them out. The scent they pick up out of the bag is to help mask any smells on your hand. But it's not overpowering. So if you still want to add your own scent you can. I use 'Tournament Pro' from Lurecraft Ind. It's like a garlic/crawdad mix.