Mix barbecue sauce with starch.  Pour half mixture into slow cooker.  

Make sure wings are defrosted and VERY dry.  Pat them dry with paper towels before putting them into the slow cooker. 

Pour the other half of the mixture on top of the wings in the slow cooker. 

Cook on high for two hours or low for four hours (I did the latter).  

Once wings are ready, if the sauce is too thin you can pour out the half and add another ½ cup of thick barbecue sauce.  This is what I did!