The first cleaning was smooth and gave me some already longer cursed sensor spots finally removed.
For the price of a "professional" sensor cleaning,
where often the same products are used,
one has after two even performed cleanings, the cost of this set there and can then be cleaned even 10 times.
I think it's worth it.
Here you should not save money and access,
because every spot in the image requires a machining,
and at the cost of EUR 5 per sensor cleaning,
you have the time you save when processing very quickly back out.