Final answer:
The most stringent cleaning system for soft contact lenses involves using lens cleaning fluid or water applied to a cloth and avoiding the use of paper towels or nose tissues.
Step-by-step explanation:
The most stringent cleaning system for soft contact lenses involves using lens cleaning fluid or water applied to a cloth. It is important to avoid using paper towels or nose tissues as they may scratch the lenses. Additionally, a lens-cleaning tool with a brush and lens pen can be helpful for cleaning the lenses.