The damage will come from a great influx of greenfly. The tiny aphids are most prevalent in the UK in the months of June and July. However, because of warmer temperatures this year there are likely to be more of the insects in Britain.
The little creatures consume sap from trees and plants.
Later they will then deposit the excrement that this produces on surfaces, including vehicles.
Mark Tongue, director of Select Car Leasing, warned of the perils of the greenfly.
He said: “They may be small and look harmless but you should not underestimate how much damage greenfly can cause.
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Mr Tongue added: “And worse still is that this substance is really difficult to remove.
“The only solution is to buy some top quality cleaning products and get stuck in with plenty of elbow grease.”
A solitary greenfly can produce 50 offspring, which can lead to a mind-boggling six million descendants in the space of a month.
Mr Tongue added: “If you are unfortunate enough to find this sticky substance on your car it is absolutely crucial that you clean it off as soon as possible.
“This is because a respray could set you back around £600.”