After tiring of reading the golden rule of dry spices, I have finally taken that big step and put an alarm in my calendar to replace all of my dry spices once a year. I confess that I haven't done it as often as I should in the past, but the reason is I never know where to get the freshest spices. How do I know they're fresh, even though they're sealed? Many spices are packaged in that clear cello - I'm sure that doesn't keep the air out. I know there are several spice shops in Kensington. I just want some credible assurance which place is best and why. Thanking you in advance.