Unfortunately, contact lens solution is the only solution to cleaning your lenses. Contact lens solution helps to clean and disinfect the contacts. You risk endangering your eyes using other homemade solutions to clean the lenses. This is because the materials used must be completely sterile. You may use saline (saltwater, pH balanced) or DIY contact solutions to rinse off your contacts, but they do not replace contact lens solutions. You should also not soak your contacts in saline solution or tap water due to the risk of contamination. Additionally, do not use tap water because it contains bacteria and microorganisms. Even boiled water does not guarantee safety.