At the time you insert your contact lenses, you should thoroughly rinse the case with warm water and allow it to dry. All contact lens cases need frequent cleaning, including disposable lens cases. Soft daily-wear lenses are less likely to create problems. Rigid gas-permeable or disposable lenses may be good choices for someone with allergies. Homemade saline solutions have been linked to serious eye infections and should never be used.
Any eye drops, even nonprescription ones, can interact with all types of contact lenses.
Check with your ophthalmologist before you use any eye drops.