Aseamstress with 60 years of experience told me this secret!
Threading a needle may seem like a simple task, but it is not always that easy, especially when it comes to thin needles or thicker threads.
Our grandmothers, with their vast experience in sewing, knew some effective home methods for threading the needle, and that knowledge can be very useful today.

Below are some very practical home tricks to do it in a simple but effective way. You can also see it in the following video from the Inova ou inventa channel:
Homemade items
Threads (for threading)
Needles
1 Toothbrush (no longer used)
Empty blister pack or empty tablet
Swab
Cable
Thin paper or cloth (piece)
Step-by-step procedure
With the toothbrush, simply cross the thread from one side to the other of the brush and take the needle from the side of the eye where it is threaded, press a little and the thread is inserted through that channel.

With an empty tablet or blister pack of tablets, simply cut a thin strip, make a small cut on one of its sides and leave a tip. Next, the test is done by simply placing the thread in that cut and passing the needle from the same hole or the eye, passing the thread in this way safely.
With a swab, proceed by cutting the sides with the cotton of the swab and thus we will have a kind of plastic tube. A thin wire or a bristle from a broom is threaded through it, creating a little hook. This kind of hook is used to easily pass through the eye of the needle and insert the thread to be threaded.

This is probably the most common and well-known method. It consists of slightly moistening the tip of the thread with saliva or water. This helps the fibers of the thread to stick together, making threading easier. Although simple, this trick is very effective, especially when the thread frays easily.
Another clever trick is to cut a small piece of paper or thin fabric, fold it in half and place the thread in the fold. Then, insert the folded tip of the paper or fabric through the eye of the needle. Once the paper or fabric is threaded, the thread follows it easily. This method is especially useful for those who have difficulty with precision.
Homemade methods for threading the needle, passed down from generation to generation, are a sample of the ingenuity and skill of our grandmothers. These tricks not only make the threading process easier, but they also connect us to a time-honored sewing tradition.

If you ever have trouble threading a needle, try some of these methods and experience grandmothers’ wisdom in your own sewing!