I use it to clean my RGP contact lenses, then soak in the regular solution overnight every night. It cleans the “gunk” off my lenses and they feel great in the morning!Not a great price but it is the original product.I use the Boston Original for years with my hard lenses. I prefer the original cleaner, but I have not been able to find it. The advanced works in a pinch, but doesn’t feel exactly the same.According to my doctor my lenses after a year did not have a lot of buildup on them. I think the lid could be easier to use. I prefer screw on caps not the attached one on this.excellent cleaner, I love it.Anyone who wears hard contacts knows that supplies needed are not always easy to acquire. This gas permeable cleanser cleans my contact lenses well and is affordable. The cap closes securely so it's great for travel too!This works pretty good for weekly cleaning, but when I got something on my lenses and it caused a splotch that wouldn't come of. I used Dawn and it worked perfectlyI have worn hard gas permeable contact lenses for 35 years and this is the only cleaning solution I will use. I have tried most other solutions that were less expensive and always come back to this solution. I highly recommend this Boston Advance product.