Many of these folks have not spoken in years. In most of these situations, the people can't remember what set the series of events off in the first place. When a problem arises, try to find a neutral place to discuss the problem, like the sidewalk, neighborhood park, or while they are in the yard. Going to the door often makes a person defensive since there is a sense of invasion. Check the Law In Lynnwood there are many local laws and regulations governing the noise, pets, eyesores, accumulation of junk vehicles.
Nuisance laws are very specific.
You can look up the ordinance at the library or city hall under the Lynnwood Municipal Code Index. Sometimes a photocopy, together with a polite note, can be mailed to a neighbor and bring desired results. Sometimes, if diplomacy fails, a letter from a lawyer can be very effective. It does not cost much if you bring the particulars to the attorney in an organized manner. In neighborhood disputes, no one is eager to confront an offending neighbor alone.