Saline solutions cannot be used to safely clean and disinfect or store contact lenses as they do not have disinfecting/antibacterial properties.
Saline solutions are suitable for rinsing lenses only and are used in combination with other types of cleaning systems.
If using a saline solution, be sure to purchase a commercially produced product. “Made at home” versions aren’t safe and can cause serious eye infections.
Your lenses should be stored and cleaned using a suitable contact lens solution.
This can often be found listed on your contact lens prescription, as the Optician will recommend a particular brand.
Alternatively, it's worth checking with your Optician to make sure you buy the best one for your eyes.