I am currently using C3 with HTP wicks. I test by changing out wicks according to melt pool. Like I said I like a little wax left around the edges so it will catch up as it burns down, but there are just some scents that no matter what I try I can't get a good throw from. Some are overpowering some in my opinion are not worth the work. I guess I need to quit going by what others say about this great scent that they claim they are getting this out of this world hot throw from. I'm beginning to believe what one person considers strong hot throw, another considers weak hot throw. And yes the area is open which I realize can effect hot throw, but I still don't think I would have to be within 2 feet to even smell it.