No, you should never use standard WD-40 or similar light petroleum-based penetrating oils to lubricate a squeaky residential clothes dryer. While WD-40 provides temporary relief, it is a solvent rather than a true lubricant; it will quickly dry out, attract sticky lint and dust particles, gum up the moving parts, and create a severe fire hazard when exposed to the high operating temperatures inside a dryer. You can troubleshoot lubrication safely. You can verify that your corrective action is safe when using a high-temperature, heat-resistant silicone grease or specialized appliance lubricant on roller shafts and pulleys eliminates squeaks permanently without attracting flammable lint or posing fire risks.
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