Sunlight because the pineal gland spiritually fed on sunlight , and don't stay with your eyes open looking at the sun, stay with your eyes in other direction,have sunglasses or just close your eyes and feel the energy of the sun on the forehead and breath in that energy through 3rd eye to the pineal gland/6 chakra
Also, try to eat fruits and veggies that make the fluoride from water and junkfood go away, fluoride is also in toothpaste(there are other ways to brush your teeths) , because fluoride is blocking the pineal gland.
Also use the Search button on this forum for keywords like : Pineal,Pineal Gland,6 chakra
Vizualization exercises and in general meditative exercises who put the HIDDEN from the world parts of the brain in action HELP, because so is the PINEAL GLAND
You can even just vizualize a golden-light energy like the sun where the Pineal Gland is located and meditate on it for some minutes being relaxed and focused.
https://satanisgod.org/search.php?x=0&y=0&query=Pineal+Gland
https://www.ancient-forums.com/search.php?sid=6f5ffd53827ec28c5d46817207e85b1c