Mind Monitor

i believe my muse has been giving bad data i cant figure out how to fix it im constantly in high delta and i dont even move and delta randomly jumps up and down, im close to taking it back

I believe it was because my forehead and the band were a little dirty I cleaned both and I was getting more accurate readings

One data set looks normal while the other one where i was in high delta was reading i was in high delta even when i wasnt meditating what can cause bad readings. also is the highest value the brain wave most dominate at the time?

is my data correct even when in not meditating it shows high delta