Paul,i thought those palstic strips are usually in between the double glazing? Gaz
They can be, but not always. I used to do a run of these type of windows, with the plastic strips stuck onto the glass when I was purely trad.
In the end I got so fed up with them I passed them onto Ian_Giles.
I still reckon supa-glue is your best bet. I'd try just sticking plastic to plastic though, don't try plastic, with glue, to glass. You should be able to just put a drop on each of the tips of the plastic.