It is generally recommended to follow the care instructions provided by the manufacturer for any swimsuit, including those from Tanthrough.com. For tan-through swimsuits, it is usually advisable to hand wash them in cool water with a mild detergent. Machine washing can be too harsh and may damage the delicate fabric, leading to loss of elasticity and color. Additionally, using a washing machine can cause the swimsuit to become entangled or stretched out. To maintain the quality and longevity of a tan-through swimsuit, hand washing is the safest method. After washing, it is best to lay the suit flat to air dry rather than using a dryer, as high heat can also harm the material. For more specific care information, it may be beneficial to check the label on the swimsuit or visit the current web page of Tanthrough.com.