Unverified80% confidenceFactTime unknown
凝胶型固体香薰随时间体积会明显缩小（水分蒸发），香味也同步减弱；石膏型体积不变但香精挥发后需重新滴精油，判断是否需更换以气味而非外观为准
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80%
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Long-term
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Unverified凝胶型固体香薰（透明果冻状）通过体积收缩挥发，当体积缩小约50%时香味浓度已显著下降，此时即使外观仍在也需更换89% similarUnverified精油需要加水稀释后雾化扩散，香味浓度不如无水扩香仪，追求浓郁香氛效果的用户可能觉得味道太淡87% similarUnverified掩盖型香精喷雾越浓香往往除味能力越弱——强香只是覆盖异味而非分解，真正除味产品喷后香味应逐渐减淡而异味不回返86% similarUnverified精油被水稀释后雾化扩散，香味浓度较低、持香感偏淡，追求浓郁香氛效果的用户可能觉得不够明显86% similarUnverified含香精掩盖异味的产品短期闻着清新，但只是覆盖没去除臭源，异味会反复；无香型+环糊精分解型更彻底但需喷透晾干，见效慢85% similar
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