Posted: 22/10/2014 at 10:22
Birdy, a domestic bin like a Dalek or a timber one (I think that is called a New Zealand bin) does not get hot enough to kill the seeds from Perennial weeds. One of the new Hot Bins (£150) would kill them. But generally Garden Organic (who train us Compost Masters) say that it is ok to use grass cuttings in an ordinary bin. When you think about how much the wind and the birds distribute seeds around your garden, annual weed seeds from the compost are the least of our problems.
To turn the contents of a Dalek, go on line and google Compost Stirrer. Mine is shaped like an arrow and is very useful; there is one shaped like an auger (drill bit) which may demand less welly to use. Or just shimmy the contents around a bit with a garden fork.
The point is to introduce air to stop the contents becoming anaerobic (smelly/slimy).