Why is a hairdryer bad for a wet phone speaker?
A hairdryer produces focused heat that can warp the speaker membrane, which is made from thin polymer or mylar film with a low heat tolerance. The heat can also soften the adhesive that holds the speaker assembly in the housing, causing it to shift or separate. Additionally, forcing hot air into the speaker grille can push water deeper into the housing rather than evaporating it safely.
What temperature is too hot for a phone speaker?
Most phone speaker membranes start to deform at temperatures above 60 to 70 degrees Celsius. A hairdryer on a low setting at close range easily exceeds this. Even a warm setting produces air around 50 to 60 degrees Celsius at the nozzle, which drops to roughly 40 to 50 degrees at phone distance but varies significantly. Room temperature passive drying stays well below any damage threshold.
What should I use instead of a hairdryer?
The Fix My Speaker eject tone is the most effective active method because it uses vibration rather than heat. For passive drying, place the phone with the speaker face-down on a dry cloth at room temperature and let evaporation work naturally. Silica gel packets in a sealed bag can accelerate passive drying without heat risk. A fan providing cool air flow is also a safe option.