The newer energy efficient clothes washing machines are great for cleaning earplugs (don't ask). I keep a glass jar on top of the dryer and after running a load of clothes - accompanied by the earplugs - I simply toss the clean earplugs in the jar and allow to air dry.
Also, if you ride long rides, and wear earplugs, you'll be vastly less tired/fatigued at the end of the day. I consider it second, only to staying hydrated, to enable me to ride < 2K-mi. trip over 10-14days. The white noise of wind/tire hum/exhaust and whatever else is existing in the transient environment just wears the human body down in innumerable ways. I keep earplugs in every riding jacket, riding pants, soft luggage, and even in the little cubby underneath the pillion seat. I deem them to be that critical!
I view constant noise as one of the biggest stressors on the human condition. I don't enjoy constant barrages of noise. It is becoming more and more difficult to find places where you can hear the wind rustling the leaves in a tree, or passing through grass. this is why I don't like living in apartments, townhouses, etc. Too much noise from everyone else. Cities are one huge blanket of noise.
One of the tests we did with potential sailors, as a pre-screening tool was to rub your fingertips lightly together--- if you can't hear that, your hearing is almost certainly impaired enough to disqualify you for entrance into the military.
I lived on board ship for a number of years. It was similar to living inside a factory 24/7. I was on shore duty then back on sea duty -- I'd moved out of base quarters, married, and was living a fairly quiet life. The next deployment was brutal, until I decided to start sleeping in ear plugs. I've been trying to conserve my hearing, ever since.
"Basic stuff fellas. Use your head for something other than to break your next fall."
"There's this adage that we have 2 ears and one mouth so we should listen twice as much as we talk. Unfortunately with the Internet people have taken this old adage and turned it around. They have two eyes and 10 fingers so they think they need to post 5 times as much as they read. And since they have 10 fingers and one brain, they only have to think 10% of the time! "