In general, the contact lenses are cleaned by the cleaning solution. Sometimes you would run out of solution or forget to bring solution in hand. But you have to clean the contact lenses to not harm your eyes. Therefore, you can clean them without solution to reduce or eliminate the risk. Firstly, please wash your hands with warm soapy water for 30 seconds and rinse them. Then, you take out your contact lenses and put them in the case if you have them, or use your hands to hold them. Next, you should pour water in hand and rub the contact lenses around in the water. In the following, you can use saline solution instead of cleaning solution to clean them. Last but not least, you use some eye drops to wash the contact lenses to eliminate bacteria.