Hoping someone can offer advice on an issue I am experiencing on my winter road bike.

It came fitted with Tektro brakes which I found had real difficulty in slowing the bike down, hills being quite scary. I have mudguards fitted so presumably a longer drop version.

Reading the advice around on the web, I swapped the brake blocks over to Swissstop Green, often quoted as one of the best around.

Absolutely no difference !

Just tried a cheap set of Shimano blocks which a friend swears by - quick run around the block and no better.

Could I have got something on the rims from cleaning / lubing ?? Not sure, but no issues with my summer bike which is treated the same way.

Any thoughts - is it cleaning or are the calipers that poor ??