Here are 3 different ways to prepare baked potatoes.  Always scrub your potato first.  Also I don’t always rub with oil prior to cooking, this just adds flavor to the peel. Thanks to thekitchn.com for these helpful tips

Oven-Baked Potatoes

Pre-heat the oven to 425°F. Rub the potatoes with olive oil, sprinkle them with salt and pepper, and prick them with the tines of a fork. You can lay them directly on the oven rack or place them on a baking sheet. Cook the potatoes for 45 to 60 minutes, until their skin is crispy and sticking one with a fork meets no resistance.

Alternatively, make foil-wrapped potatoes: Follow the same directions as for oven-roasted potatoes, but wrap the potatoes in foil before cooking.

2. Microwaved Potatoes

Rub the potatoes with olive oil, sprinkle them with salt and pepper, and prick them with the tines of a fork. Place all the potatoes on a microwave-safe dish and microwave at full power for five minutes. Turn them over and microwave for another 3 to 5 minutes. If still hard in the middle, microwave in additional 1-minute bursts until cooked through.

Alternatively, make wax paper wrapped potatoes: Follow the same directions as for microwaved potatoes, but wrap the potatoes in wax paper before cooking.

3. Slow-Cooker Potatoes

Rub the potatoes with olive oil, sprinkle them with salt and pepper, and prick them with the tines of a fork. Wrap each potato in foil and lay it in the bottom of your slow cooker. Place the lid over top and set your slow cooker to LOW for 8 to 10 hours