PlantBrown tissue will not turn green again. The useful goal is healthy new growth and stopping the damage from spreading.
Look for a pattern in the damage
Dry tips on older leaves can accumulate over time, while rapid browning across the plant suggests a more recent stress. Note whether edges are crisp, patches are soft, or damage faces the window. Each pattern provides a clue, but several causes can overlap.
Take a photo before trimming. That gives you a reference for whether the damage continues. Do not assume every brown edge means low humidity: roots that are too wet or too dry can both leave foliage unable to maintain normal water balance.
Review watering and dissolved minerals
Check the mix below the surface and inspect the pot for trapped water. Repeated severe drying can damage tips, but so can unhealthy roots in persistently wet medium. Review how you water, not only how often.
White crust on the pot or mix may indicate mineral deposits from water, fertilizer, or both. Check whether you have been combining feeds or using more than the label directs. If buildup is suspected, seek guidance appropriate to the plant and medium; flushing a waterlogged, root-damaged plant can worsen its condition.
Measure the environment instead of guessing
Dry heated air, a nearby vent, hot glass, and cold drafts can stress foliage. A hygrometer gives a more useful humidity picture than assuming a room is humid because it contains plants. Misting briefly wets leaves but does not reliably maintain the humidity of an entire room.
Choose plants that fit the environment you can sustain. If using a humidifier, keep it clean and avoid persistent condensation or wet foliage. Air movement and room hygiene still matter.
Trim only for appearance, then monitor
You may trim completely brown tips with clean scissors, following the leaf shape and avoiding healthy tissue. This tidies the plant but does not treat the underlying cause. It is also fine to leave cosmetic damage while you investigate.
Keep care stable after making a reasoned correction. Check new leaves and whether the brown margin advances. Track the change in PlantPal so you can distinguish an old scar from a continuing problem.