Use a little dish detergent on those heads... they pop right together.
Only problem with the pro-grades (I have some woodies and a dozen teal) is that like most GHG decoys, if you look at them too hard... the paint comes right off. Hunted the teal about 5 times and keep them in slotted bags... already have quite a number of huge paint flakes coming off.
Everytime I buy some more, I swear it'll be the last lot.. but they seem to come out with something that looks pretty good and since they are about the only ones sold at almost every store... hard to ignore them.