Looking for an efficient descaler I grew find him here.
It should not vinegar (time, smell, rubber gasket / metal, lung, taste)
no Citric acid (limestone> calcium, sparingly soluble, clogged nozzle, attack aluminum, decalcification must run hot)
no tartaric acid (time, quantity)
No lactic acid (time, quantity)
be and no hydrochloric acid (smell, non-ferrous metals, lung, handling).
This amidosulphonic one acquires a safe and inexpensive product which is present as a powder. It does not develop fumes when dissolved in water and is corrosive to a lest the lungs. It works fast. It is tasteless. It does not require three rinses. It is efficient (moderately strong acid) and I do not need order 5 kg bags with citric acid.
It seems cold and warm.
Descaling. Use again. Good!
And at some point I will buy the 5 kg and should thus have safe hands for the rest of life;)