yeah need help on this too!!, my mk4 has been killing em bigtime this week, never really noticed em before but this week i think ive been killin em 'en massive' lol,
if it get really bad when i come to wash me car i take an old bath towel (big enough to cover the front of your car), get an empty bucket, put it in it , bopil a kettle a few times so water is mega hot

bung some 'sundrops' detergent in (no salt), then once youve washed the shate of your car (normal road grime i mean), remove the towel from the bucket (wearing gloves unless you have aspestos hands like me) drap this over windscreen/front end etc.... and leave for a few mins, then take it off and have a go with your sponge now, on mine most of the fly guts/legs/wings ect come off easily, then repeat anywhere else, although if water isnt not far off boiling point it dosnt work...
thats my tip, it works and its better than leaving em on...... summer is good.....
but the road kill goes up....
