Krakonos, Normally you redo my calculations, now it is my time to watch out for you :) You wrote: So a teaspoon of soda bicarbonate in 25 ml of water 5 times during Friday definitely helped. 1 can of, say Pepsi, is 33 cl. Your 25 ml is 2.5 cl. That is LESS then 1/10th of a can of Pepsi. I suppose you meant 25 cl per tea spoon of bicarbonate. I am however not sure what a tea-spoon is? Is that like a coffee spoon?