Preface by saying there's a big jar of reclaim and other waste collected over several years in the freezer "for emergencies." Don't expect it will ever be used.
By reclaim, do you mean only vaporized concentrate that has re-condensed on your rig? This process is essentially similar to distillation (albeit without fractionation), so there needn't be anything wrong with it, if your gear is kept clean. (Some use "reclaim" to refer to any waste - spatter, washes, etc; if you "reclaim" carbon buildup, you'll lower the overall quality.) It's decarbed and doesn't taste especially good, IMO, but it's otherwise fine with lots of remaining activity.
To reduce the amount of reclaim you produce, you can remove restrictions in the air-path where if collects. As you shorten and increase the diameter of the air-path, you decrease the surface area on which reclaim can re-condense, so more vapor gets to your lungs. Don't think it has too much to do with temperature, but higher temps might help reduce the amount. It will also inactivate terpenes, reducing flavor and entourage effects. You could also try filtering through hot water. The water and glass will be warmer, so you'll decrease the temperature drop from the nail or banger. Hot water also makes its filtration more effecient (but not as cool, obviously).
Whether it's worth the hassle depends on supply and demand. If you have plenty of first-rate supply, there's less demand for reclaim. It also depends on whether you like edibles/topicals. That's really all that reclaim is good for, IMO. There's the sub-par flavor, but even if you're careful, it likely won't be quite as clean as your first run. Your gut is much better at dealing with impurities than your lungs, so oral administration is generally a more forgiving route.
