It is possible that the contacts of the outdoor thermometer are corroded due to leaky batteries. When batteries leak, they can release corrosive chemicals that can damage the contacts of the thermometer. This can lead to poor electrical connections and malfunctioning of the thermometer. It is important to regularly check and replace batteries to prevent leakage and corrosion. **

To revive corroded battery contacts and springs, you can use a mixture of baking soda and water to create a paste. Apply this paste to the corroded areas and gently scrub with a toothbrush to remove the corrosion. After cleaning, rinse the contacts and springs with water and dry them thoroughly before reinserting the batteries. Additionally, you can use a small amount of vinegar or lemon juice to help dissolve the corrosion. **

It is difficult to determine from the image alone whether the spark plug is just rusty or also corroded. Rust typically appears as a reddish-brown discoloration on metal surfaces, while corrosion can manifest as a white, powdery substance or pitting on the metal. To accurately assess whether the spark plug is corroded, a closer inspection or testing may be necessary to identify any signs of chemical deterioration or damage beyond surface rust. **

If the zipper on the tent is corroded, you can try using a lubricant like silicone spray or WD-40 to help loosen the zipper. Gently work the zipper back and forth to see if it starts to move more freely. If the corrosion is severe, you may need to replace the zipper entirely, which can be done by a professional or with a DIY zipper repair kit. **

To revive corroded contact tongues and contact springs of batteries, you can start by removing the corrosion using a mixture of baking soda and water. Use a small brush or toothbrush to scrub the affected areas gently. After cleaning off the corrosion, rinse the contacts with clean water and dry them thoroughly. You can also use a small amount of vinegar or lemon juice to help remove the corrosion. Once the contacts are clean and dry, you can reassemble the battery and test it to see if it is working properly. **

A contact that has been corroded by battery acid can sometimes be repaired, depending on the extent of the damage. In some cases, the corrosion can be cleaned off using a mixture of baking soda and water or a commercial contact cleaner. However, if the corrosion has caused significant damage to the contact, it may need to be replaced to ensure proper functioning of the device. It is important to assess the damage and consult a professional if needed to determine the best course of action. **

Yes, there is a form of extreme hiking camping known as backpacking or wilderness camping. This type of camping involves carrying all necessary gear and supplies on your back and hiking long distances to remote and rugged locations. Backpacking often requires a higher level of physical fitness, outdoor skills, and self-sufficiency compared to traditional camping. It can be a challenging and rewarding way to experience the wilderness in a more immersive and adventurous way. **

While camping and hiking, you can enjoy various outdoor activities such as fishing, bird watching, stargazing, and wildlife spotting. You can also explore the natural surroundings by taking nature walks, swimming in nearby lakes or rivers, and even trying out some outdoor cooking. Additionally, you can challenge yourself with hiking to scenic viewpoints, setting up a campfire, and simply relaxing and enjoying the peacefulness of nature. **