I have had problems with the pedal arm coming loose to the point where the it gets worn and will not hold any longer. I am tightening with to the maximum point using Loctite. However it is not blue colored originally sent with the bike it is clear “superglue “. I would like to buy more crank arms just to have. I am on my 4 th arm now and luckily it has not come loose in the last 100 miles! What do you advise?