What is an effective way to clean them? (without damaging them)
Isopropyl alcohol on a paper towel or cloth would be an alternative to prepackaged wipes. A mix of water and bleach is an option but I don't know what the best ratio would be for this mix. I would Google the recommended length of time for application of disinfectant as it varies for what is used ie hydrogen peroxide, isopropyl alcohol, bleach mix etc.