It depends what MB you had / you had. Because, for example, in Vito the visuals are worse than in Tico.

You say water with soap is enough, you don't have streaks? By the way, soap residues are just as effective in preventing adhesion. And, this time Google works well for me, I even found the company's mission:
The company's vision is the Home and Automotive Technical First Aid - "a medicine in the fight against the malignancy of inanimate objects".
I keep reading and what I learn:
Technicqll products, as in the case of a medical kit, are associated with a medicine used in the fight against a different kind of disease - "inhuman", related to malfunctioning everyday objects caused by tearing, various types of contamination, corrosion, surface protection against friction, unpleasant smell, aesthetics, etc.
Of course, you can disagree with me and get this company to the skies. I'm just begging you, don't put a shit here on people who use professional chemistry for heavy money. Which often fails despite meeting all the conditions. Do not compare the packer with your blister packs, where the bulk of the product is a box with flashy Loctite lettering.
I leave the gluing of the cooling system hoses without comment. To stick the V-belt, you also have to be a world champion, I'm afraid that my friend doesn't really know what a broken belt looks like.