I love to stir fry. What I don't love is the sticky grease coating that over time accumulates on every surface near the stove, including cupboards, kitchen items and the floor.  I don't have a range hood and can't get one because my kitchen is not on an outside wall, so I'm thinking about getting myself a metal mesh splatter screen.   It's obvious that such a screen works well against the bigger splatters since the drops are simply too big to pass the gaps, but will it work against the fine mist of oil that causes the sticky coating as well? 
Leave the caramel to cool further, as the thickness should increase as it cools.  Once it is at the required thickness, you can drip ropes of caramel on to the apple to make a drip effect.  Alternatively have a separate thicker caramel to make the drip effect.  This is can be seen as a sugar work/pulled sugar technique.  Also it woudl be recommended to do this in advance to allow the caramel to fully harden.  Note: temperature and humidity can affect the caramel. 