Article written by We Review Websites If you’re constantly waking up with a stiff neck or back and end up feeling lethargic throughout the day, it might be time for a mattress replacement. It may be tough to figure out when to replace your mattress, so keep an eye out for any wear and tear when you change your sheets. Mattress owners tend to forget to replace their mattress which only affects your sleep quality in the long run. When was the last time you changed your mattress? If it’s been more than 6-7 years, you’re overdue for a new one. You can also think back to how your…