How often should I replace my mattress to ensure optimal comfort and support for a restorative night’s sleep? Is there a specific timeline that one should adhere to, or does it vary based on the materials, usage, and individual preferences? Over the years, as I lay on it, how can I ascertain if the mattress has succumbed to wear and tear, potentially compromising my health and well-being? Are there distinctive signs like sagging, lumps, or an increase in allergies that indicate it’s time for a change? What about the impact of my sleeping habits—should a restless sleeper consider switching mattresses more frequently than someone who enjoys a peaceful slumber? Furthermore, in the realm of different mattress types, from memory foam to innerspring, how do longevity and wear differ across these categories? Ultimately, how can I make an informed decision regarding the right moment to invest in a new mattress for my overall sleep quality?