Something I like to do every year before Imbolc (or Candlemas) is to physically clean and bless my candle holders. The physical cleaning is a little different for each – depending on the material/shape/size. I personally don’t cast a circle or anything like that for the physical cleaning, though you certainly could.
I like to do the ritual blessing as near to the full moon before Imbolc as possible. Here what I do: I gather all my candle holders and a bright smelling oil like lemon or peppermint. Then, I cast the circle as usual and take a few moments to soak up the feeling. I trace a pentacle in oil on each candle holder, while saying something along the lines of “I purify thee, and sanctify thee, in the name of the reborn God and the renewed Goddess“. When I have finished with all, I close the circle put the candle holders away until I need them – also, I wipe the oil off if it might ruin or react with the material.
Generally speaking, I do this separately from my Esbat ritual – but certainly could do it as a part of a larger ritual.