should be good then mate. its worth giving them a poke (not being rude!) every now and then to make sure they are clear. The black screw caps are a sh1t to put on, i think there might be a knack to it.
Did you not notice the drivers side grille has vents when you did the job?
LOL..No I didn't notice ...the first time I took the passenger side "grille " off it was a bit tricky and I was concentrating on that ...second time was easier but I still never looked at the other side even when I removed one of the screw caps on that side to see how they fitted on ....I think the cap and screw are a matching pair so the screw head fits tightly into the cap. ..I'll need to get a couple of replacements as one is completely missing on the passenger side and the "grille" is not as tight down as it could be and obviously there is a hole where the screw /cap should be .It wd look neater with the caps in place .