I know I'm supposed to be doing school work but it's my free period so don't give me crap about it please.Also, if you know some can you post a few because our teacher blocks them like crazy and a lot have already been blocked.Thanks!
My guess would be that using anything but water and mild soap at most to clean the shield causes it to break down prematurely.
Canada in an interesting mix. Metric officially for almost 50 years now, but, vestiges of Imperial are still there, e.g., in buildings. And, we use the American gallon for irrigation water, not the Imperial one. Canada may be a bit moire metric than the UK though. My daughter is 20, and barely understands when I use Imperial. So, it can be a bit of an age thing.
