Dear one,
The mantra you need to recite is as follows:

HAY HAY LI YO PAK TAI YA

Please recite half or one mala, or recite it 21 times, and then blow on your food. Also, you can hang the mantra around your neck or put it under your pillow. If you wish to be able to sleep, you should do this practice. If you do this, then definitely you will be able to sleep, without doubt.

Another remedy is to take some nail clippings and hair from a girl born in the year of the tiger, and write the mantra on a piece of paper. Put these things and the mantra inside the mouth of a frog made of wax. In the daytime, turn the frog toward you; in the nighttime, turn the frog away from you, then you will sleep well.

You can also paint saffron on the mantra below:

OM TSEDAREA GOR TIN LA PEMO MU KYE MAL CHOR CHOR

There are also other methods for lack of sleep due to spirits.