Somewhat new to DIY vape juice. Ive purchased multiple concentrates from multiple different vendors. Probably over 100 concentrates. I've tried 3 different VG/PG bases. I've tried 3 different nic manufacturers. Everything is ALWAYS harsh. I vape at 3mg and I measure accurate. I've replaced my PG with distilled water and still harsh. Funny thing is I tried vaping just pure PG and it still somewhat harsh. I know PG isn't supposed to be harsh. But it is. Not as harsh as the full mix but still not smooth as silk like it should be. I've used nicotine river PG/VG and liquid barns PG/VG. All harsh to me. What can I do? I vape store bought vape and it's beautifully smooth. I steep for a month with rotating caps on and off. Does saline make it any smoother? I must not be adding something to my mixes. Any help would be much appreciated.