Sorry to hear about your 'fly' problem - not a bother down here, we only have nice things like nesting birds etc. We had a family of blackbirds until they fledged last week and we now have lodgers in a birdbox on the cave - haven't found out what they are yet tho.
Will Do! LOL I presume you mean 'Bluebottles'. Yes they do get on your wick but a 'bit of card' isn't fatal enough, you need a rolled up newspaper or TV mag and splatter them to kingdom come - like you mean it!! They carry germs too but 30 drinks is neither the answer to them or cooling down - alcohol dries you out and makes you hot - you need iced water.