I'm about to embark on direct dripping. Tired of fooling with carts and refilling and washing out polyfill, cutting foam, etc. I'm wondering how many drags in general you can expect to get on each drip. Is this something you have to do every puff? 3-5? I know this can vary from person to person; I'm just looking for a range. Is there some sort of "signal" that you need to refill - like a wierd taste or sound from the atty? Sorry for all the noob questions!