Full disclaimer- I don't have experience with PCTG, sorry.
However I was able to find a manufacturer's spec sheet for Eastman DN010.
This was listed as being a "PCTG" material, also related to PETG and others in that general family.
The data sheet is at- http://ws.eastman.com/ProductCatalogApps/PageControllers/ProdDatasheet_PC.aspx?Product=71052377&sCategoryName=Generic
Very interesting stuff.
But what pops out immediately is its high process melting point (249-271°C) and its extreme chemical resistance, either or both of which could be the problem.
You may not be heating it up enough and nothing short of a "PCTG juice" is going to stick to it apparently.
The working temperature is also at the very limits of what a normal FT-5 hot end is capable of because of course you may want to heat it even higher than 249-271°C to get it to flow well and stick to things.
Walter is working on a higher temp hot end that might do the trick.
As for making a PCTG juice for the bed, you might want to take a look at the PETG column of this chart for things that are marked "N" because they might dissolve PCTG (a related plastic).
I hope this helps.
It sounds like a neat material if you can get it to work.