Or if you like to make it hard for yourself do what I just did yesterday.
Got a plastic up and some cotton buds (cotton swabs) put a bit of water and drop of dishwashing soap and put a drop of Malathaion or as David suggested you can use water based insecticide (ones for mosquitos and ****roaches) if you are using a spray, then spray some into the plastic cup and then put a bit of water and soap or just use the pure liquid from the spray.
Soak the cotton buds in the liquid and dab the scale insects with it, one by one.
That is what I did, I hate the smell of Malathaion, really bad, but I hope it works. If not I will really try what Dave tried with hose hold water based insecticide.
This is the same plant that I tried with just soap and dishwashing liquid, after a few months scale insects are back. I understand that ants are the ones that actually put them there in the first place, but I feel that the ants are food for the pitchers. My sarracenia Leucophyllia is the one that is infected.
TTFN
Arvin