Rest can do real work on certain problems and nothing at all on others. Knowing the difference saves cigars.
Rest fixes: moisture imbalance after shipping, the rough youth of a freshly rolled cigar, mild ammonia from incomplete fermentation off-gassing, and the closed flavours of a cigar that has not yet had its components marry. Most of what readers describe as “harshness in the first inch” of a young cigar falls into this category, and a few weeks at sixty-five percent humidity will often turn the cigar around entirely.
Rest does not fix: bad construction, mould, beetle damage, a split or torn wrapper, plugged bunches that draw too tight, cigars stored badly for years before reaching you, or genuinely cheap mixed-filler tobacco. If the same issue repeats after weeks of patient rest at stable conditions, the cigar itself is the problem. Move on.
A useful triage: smoke one example after thirty days, one after sixty, one after ninety. If the trajectory is improvement, the cigar is settling and the blend is sound. If the same flat or harsh notes repeat at every checkpoint, no amount of additional time will rescue it.
The longer treatment of rest as a discipline, including the diagnostic patterns for dry, wet, and too-fresh cigars, is in How to Rest a Cigar.