Ref Cleaning maps, i find that Jif is perfect!
Ref which books to use. I started off with Pratt but have found him too complicated and have gone over to Pooleys, much simpler to understand and closer to the exam questions!
Talking of exam questions, buy yourself a copy of the PPL Perfector..I couldn't be without it now!
Ref starter kits, yeah, I made the mistake of getting the AFE one. Most of it I now don't use (including the bag!) In fact the only thing I do use now is the nav ruler