Ahhh - life in Costa Rica!
Do you have bats hanging around your place (especially in corners, by doors & just on the exterior of your house in general - especially if there's light around it) "doing their thing" (going caca•pooping•shitting•feces) down your wall which is hard to get rid of???
BB ("Buff Boy") - one of the workers where I used to live, rigged up this concept which REALLY WORKED with a BIG problem I was having with LOTS of bats pooping•shitting•feces•caca on the walls = especially because their caca is SOOO HARD to get off the walls (and when you do it will chip off your paint)
• Take 2 CD's
• String them next to each other with the shiny side forward & wrap around 2 nails & vwala - they go AWAY!!!
(I don't get why - but it works!!)
Because the cd's could keep moving - especially in wind - you might want to put another nail in the middle or drill a hole in each cd so you could tie that string through it.
Here are some links to clean it up: