To ensure that the foam cannon works optimally and has a long service life, we recommended you rinse it in clean water after use.
Soap and other chemicals wear on both o-rings and mesh (the steel filter inside the foam cannon), and can crystallize so that blockages occur.
If crystallization of soap/chemicals has occurred in the foam cannon, this can usually be solved by placing it in water overnight. Then rinsing it with lukewarm water until all soap residue is removed.
As far as possible, avoid leaving bottles of soap/chemicals on the foam cannon when it is stored. This can lead to both crystallization and can destroy the suction hose that is left in the soap/chemicals.
Eventually the mesh/steel wool layer inside the cannon will wear out, but can easily be replaced, and the mesh is included in the AVA first aid kit.
It is particularly important that foam cannons with brass components are cleaned after use. Many modern soaps have a strong corrosive effect on brass and in extreme cases can soak into the brass itself and make it porous. Green irr on the brass is a clear sign that a reaction is taking place in the metal. Use water or a neutralizing solution to stop the corrosion!