Do SLR cameras have to use an oven? Can you replace him with other tools?

It's not necessary. Five or six dollars to buy a bottle of 500 grams of color-changing silicone desiccant (chemical stores and photographic equipment stores have it, but the price is much higher), put 250 grams in breathable stockings, then tie the stockings in a knot, then put the camera and silicone stockings together in a plastic bag and tie the bag tightly.

If the silica gel changes from blue to red in a month or two, it means that the silica gel absorbs water. Put the silica gel in the microwave oven and dry it with very small fire to make it blue, and then it can be used again (in summer, you can also expose the silica gel to the sun to remove water).