Struggling a bit with puttying windows. I bought a clipt putty knife but I don't even know which way round to use it...(!) Whenever I do the long slide down or across the putty breaks up. Would that mean the putty is too dry? It's nice and sticky when I roll it in my hands. I appreciate it's probably one of those things that's impossible to teach by reading about it but if anyone's any tips I'd be really happy. Thanks.