Synchrobit Miner...lower transmit scale

Noob question. Searched the site and didn’t see a good answer. I just synched Synchrobit. Has been working for over a week. 5 witness…83 beacons…transmit scale of .47. I don’t have it outside, or by a bug screen. Just sitting in my attic right now, 6dbi. Less than impressive returns. Any thoughts on what I can do to hit more? I am only one in my hex and surrounded by plenty of other neighbor hex. I keep bouncing signals to Kuwait, China, etc… Occasionally I witness close to me. Would appreciate any thoughts?
Thank you.