Everyone's is closed unless you are literally living off grid and only living off the land including water. Stay away from fluoride water and toothpaste, clean up the diet everything clean and nothing processed. There are a few things you can do to help open it, once it is open you can literally feel it when it gets activated. It's weird at first as it is something different than our 5 senses. DYOR but

• There are many herbs you can take, moringa being one of them
• Only drink distilled water for 30 days. Beyond 30 days would rid your body of essential minerals. So 30 days max.
• Binaural beats you can put on while working or when going to bed like the one below

Shaman drums pineal activation https://www.youtube.com/watch?v=EV-iFym8jUE&t=1634s

Pineal gland activation https://www.youtube.com/watch?v=TXCKVQiqXyE&t=1220s

Black screen for sleep https://www.youtube.com/watch?v=lYPjzOrAUr0