It really doesn't matter what media (in this case half silica sand and half coral sand) I use, it is always wet. That's because I keep my potted Mexican/equitorial Pinguicula in plastic trays, and I keep the water levels in the trays, near the top of the media levels in the pots. I do this year-'round, and also keep the lights on 24/7/365.
Here is a photo of Pinguicula gypsicola, growing into a split crown, which is in its own rocks glass. The media in the pot is just below the top of the rocks glass. I refresh the water in the glass, daily, to maintain the level just below the media surface.
Fed weekly with dried powdered bloodworms and dried powdered locally captured insects. Also with a bi-monthly spritz of 80 ppm solution of Peters 20-20-20 soluble fertilizer with trace minerals. When I spritz, I wash the insect powder between the leaves and into the crown of the plant. The insects exoskeletons are made of chitin, which promotes chitin eating bacteria. Since these plants are prone to crown rot, promoted by nematodes, and nematodes egg shells are made of chitin. Hypothetically using lots of powdered insect remains, suppresses nematode populations, reducing the incidence of crown rot. Also chitin feeds beneficial fungi, such as Trichoderma species.
There are several successful cultural methods that work with these plants. Most are more of an attempt to duplicate the natural environment. I like to illustrate a method that is outside the typical, yet produces excellent results. I developed my methods by following the advice of my first college Horticulture professor. His lesson was the lesson of limiting factors. That growing plants depends on a complex interaction of limiting factors. Factors such as; light, photoperiod, water, water quality, soil moisture level, humidity, soil/media, temperature, nutrition, and etc. If all factors are optimal, and balanced with each other and the plants, growth and health can also be optimal for the particular plant genotype. Hence producing a plant with a clearly defined phenotype.
If you look closely you will see that several flower stalks are forming on the left, and this plant is quickly approaching flowing time.