Locks can be a couple of hours or 24 hours plus so if you havent witnessed anything yet its not to say they havent done anything, its just a case of catching them in the act.
Like it has already been mentioned if you keep to 3 days in and 3 days out and you should see something if they are ready to breed.
I dont cool as such , i take advantage of a colder cool end during the winter.
what do you mean by not cooling as such and taking advantage of the cool end during winter? how do you do this? please explain