How to clean the air filter foam my portable generator for my home? Thank you in advance?

transportable generators for residence use, you should keep a radiant complexion: question by Dinesh DD : How to clean the air filter foam my portable generator for my house? Thank you in advance? How to clean the air filter foam my portable generator for my house? Generator manual says to clean it with an agent. It is not possible to explain what Agenten.Also What need to I use chemicals or cleaning correctly? Please explain the whole procedure. What oil is saturated in Thank foam air

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