Spurting out under pressure, the first few blasts caught me unawares and resulted in the foam going all over the place. Best apply in surroundings that are not too precious, for example, avoid use on the best shag-pile carpet. It is quite easy to be accurate, but I found it best to keep the nozzle three or four centimetres form the drive train. Best results seemed to come from a generous coating without creating huge banks of foam. This required a steady hand moving smoothly. Rotating the chain backwards and keeping the can still worked well. Chain rings and cassette could be treated less fastidiously. I gave them a really good coating, ensuring it found a way into each nook and cranny of chain rings and jockey wheels. That involved spraying from the rear as well as the side.

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Is getting foam all over the place a problem? There did not seem to be any ill-effects on the paint job or the garden flora. Equally, whilst one aims for a good coverage, there’s no point being profligate. I did better the second and third times around, helped by gentler flow from the spout. In any case, it is o worse than the pools of dirty run-off or splatter of poorly targeted spray.

A real plus, there’s no doubt about any bits you have missed!

Working the foam in with a brush helps to get it into those nooks and crannies which might not get a decent dose. It also, of course, loosens up thicker grease. Agitation is not mentioned on the can, but it leads to better results.