Unplug the sensor from the wiring harness, and get a special O2 sensor socket from the auto parts store (some loan them out for free) and remove the old sensor from the exhaust bung. If the sensor won't budge, try more penetrating oil or attempt the removal with the engine warm (be careful not to burn yourself).
However, a mattress that is too soft is just as bad for low back pain as a mattress that is too firm. In a 2005 study, The Journal of the Canadian Chiropractic Association pointed out that in a survey, 76% of orthopedic surgeons recommended firm mattresses.
The previous three mattresses are some of the best memory foam mattresses that can be made â but thatâs not necessarily what everyone wants. Zinus provides a good memory foam option that is comfortable, offers good support, and is relatively durable, for a very reasonable price (<$300 for a Queen). This mattress is popular and sold through many online outlets like Amazon, but Iâd check out their line on their site for the best deals.