I only got 2 spray heads too, I think Richard's getting stingy with them.
I found (from the blind test sample of it) the interior dressing worked better as a wipe on/wipe off product than it did as a spray on/wipe off anyway, so just hold a microfibre/applicator over the end of the open bottle and turn it upside down for a second rather than spray it on.
I've still got about 70ml of the glass cleaner left from last time it was featured too (along with 6 other glass cleaner samples and a litre of G6 I won from Waxybox), so I doubt I'll be using that one any time soon. Come to think of it, I've still got some of the interior stuff left from last time too.