Overall:
Since I found the hydrogen peroxide solution, I have been saved. It is the only one that sterilizes and cleans the lenses thoroughly. I have tried other brands depending on the price, and what applies to this one applies to them as well.

-------- Cleaning function:
It has a case and at the bottom, it has a noble metal as a catalyst. The solution contains hydrogen peroxide and lubricating substances. Hydrogen peroxide is a disinfectant, it kills bacteria and reacts with the catalyst, which converts it into water and oxygen. The oxygen bubbles help in washing because they agitate the lenses and remove the biofilm better. The solution needs about 6 hours and then it essentially turns into water + lubricating ingredients. While it is active, it should not touch your eyes, so make sure you leave it for at least 6 hours.

-------- Daily use:
I use it daily, I put them in before I go to sleep, and in the morning they are ready to use. Some people use other solutions for daily use and use this solution once or twice a week for deep cleaning.

-------- Pros:
You don't need to rub the lenses to clean them, you don't have to worry about bacteria or residue from your fingers when rubbing them, etc. Just put them in the case, add the solution, and leave them for 6+ hours.

-------- Cons:
Other regular lens solutions can also be used as eye drops or you can take out the lenses for a while, put them in a solution, and put them back directly. You SHOULD NOT use this solution like that, as it contains hydrogen peroxide and it burns. Also, it must be used with a case that has the metallic catalyst. If you put it in a regular case with lenses, it will not be neutralized and it will burn your eyes if you wear them. It's not exactly negative, but its usage is very specific, and it's important to know that.

-------- Suitable for all types of lenses?:
I have used it with hard lenses that are for a long time, monthly, and quarterly, and I never had a problem. Every time I cleaned them, they felt like new. I have read that some monthly or weekly lenses are made of a more gentle/soft material and they can be damaged by hydrogen peroxide. However, I do not know exactly which brands or types of lenses are not suitable to be used with this solution.

-------- Colored lenses:
It says that it may discolor them because hydrogen peroxide is a disinfectant and also a bleaching agent. I have used it with crazy colored lenses and with various other designs/colors that I bought to try, and there was absolutely no problem. If the color is plasticized, obviously nothing will happen. If it is a special dye, then it might react with the hydrogen peroxide it contains. But you should check this on your own for certainty.

-------- Safety of use:
If your eyes sting, it means that you did not leave it for enough time or you put it in a different case without the metallic catalyst. It contains HYDROGEN PEROXIDE, which burns! It must be used with the specific case and you should wait for 6 hours (until the bubbles stop completely).