Nightly i use crest 3d white glamorous white mouth wash. is this stuff safe to use nightly? it contains only 1.5% hydrogen peroxide which is relatively low from what i understand. any concerns about doing this? should i limit the frequency?

You get the best results from any teeth whitening agent immediately after the tooth have been professionally cleaned. You are right the Hydrogen Peroxide % is low. Remember not to eat any pigmented foods for a couple of days after using teeth whitening agents. You will get a better result with professional whitening trays - it may be cheaper in the long run.

All the ingredients are safe to use every night. Don't drink any coffee, tea or colas after rinsing and brush next morning after eating .You can even rinse again.