Mexican pinguicula are by far the easiest of the pinguicula family to grow. I do have a website dedicated to pinguicula care but I'm not sure of the rules regarding posting foreign website links so I'll post some basic care notes, I hope they help.
As long as you give them pure water (reverse osmosis, rain water, distilled, deionised - water with a low/nil dissolved mineral content), soil lacking nutrients (so a peat based soil would be good, as long as it is mixed with various aeration materials such as perlite or pure silica sand (no fertilizers!)) and keep them not quite moist (and not allowing them to dry out) you should be okay - that and with as much sunlight as they can get (they do very well on a windowsill, that's where all mine are) and you are good to go.
Humidity for mexican pinguicula isn't as much of a concern as tropical or cold temperate species and some of the easiest mexican pinguicula species to grow are P. Weser, P. Esseriana, P. Moranensis and P. Tina.
Mexican pinguicula do also have a dry dormancy period. Unlike venus fly traps ("dionaea muscipula") and American pitcher plants ("sarracenia") pings do not die back, although their growth is slowed. Dormancy is induced by a reduction in light levels, prey levels and watering. The pinguicula should start to form non-carnivorous (also known as succulent) leaves which will stack unto each other and look somewhat like a carnation. This process usually happens mid to late autumn and will reverse come early/mid spring depending on when light levels pick up again. I haven't tested the effects of skipping dormancy on pinguicula however I have noticed that plants that have endured a disrupted dormancy (ie. not been left to do their thing and have been moved/kept warmer/moister than usual during winter) have not provided viable seeds.
It is possible that skipping dormancy in pinguicula will have a similar effect to that of skipping a venus fly trap/American pitcher plant's dormancy: a decline in health leading to death.
A note regarding P. Tina: Gorgeous species but it will only go into dormancy when it wants to. I've had one for two growing seasons now and it hasn't gone dormant at the same time as my other plants. Most of mine are coming out of dormancy whereas my P. Tina has started showing signs of going to sleep. Odd heh.
"There will come a time when three words uttered with charity and meekness shall receive a far more blessed reward than three thousand volumes written with disdainful sharpness of wit."