|Keep It Simple, Stupid|
IF you can get pure citric acid (as opposed to lemon juice which tends to be watered down and expensive) that should be more effective as it has a lower pH value, 2 versus 3 for vinegar.
When I went looking for an alternative to the £4.50 for 2 applications kettle defurrer product that my wife had been using as seems to be responsible for rotting the rubber seal on the kettle but barely seemed to touch the chalk, I found brown malt vinegar was available in 5 liter containers wholesale for £3.00. We've been using it twice a week for over a year and its still 1/2 full.
Dunno what it tastes like, but who cares :)
With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.