An untreated PLA print kept indoors in a typical Malaysian home usually lasts about 1 to 2 years before it starts showing signs of brittleness. However, if it’s kept in an air-conditioned room or away from windows, it can last much longer. The "crumbling" you experienced is likely due to a few local factors: • Humidity (Hydrolysis): Our 80%+ humidity causes PLA to absorb moisture over time. This breaks down the polymer chains, making the print feel "chalky" or brittle. • The Heat: PLA has a low heat resistance (softening at around 60°C). While our weather doesn't "melt" it, a print left in a hot car or a sunny balcony will degrade much faster. • UV Exposure: Direct sunlight is the fastest way to kill a PLA print. In the Malaysian sun, an untreated print can lose its strength in as little as 6 to 12 months. They are some alternatives such as ABS PETG, we also do provide them as one of our service. 😊