Bird excreta is a nasty mix of faeces and urine but it’s easily removed by brushing off if dry or gently washing away with a mild ph-neutral soap, or a good tent cleaner, before swilling well with clean water.
Renew the tent’s external Durable Water Repellent (DWR) finish if this has been stripped away – unlikely with a ph-neutral soap but avoid detergents.
Birds are lovely to watch around a campsite’s feeding station but can relieve themselves of that heavy meal on a most inopportune place – your tent!
This is often mistaken for tree sap but is, in fact, the sweet sticky secretion of certain insects, like aphids. It creates the splattering effect of tacky dirty rain that looks a disaster. But you’ll find it easily washes off – even heavy rain can often clean it away.
Tree sap often comes as that awful conifer resin that smells delightful yet spreads mayhem like napalm − a sticky mess when heated even by the sun. If left to deal with at home the chances are, unless liberally sprinkled with talc, it will spread and adhere to anything it touches. Remember, it gets stickier and more liquid the warmer it is – and think how hot your car can get.