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Rinse the bathtub if it hasn't been cleaned recently. Plug the drain and begin filling the tub with water. Adjust the temperature of the water so that it is no hotter than 100F (38C). Fill the tub until it is about 2/3 full, then turn off the water. Bring something cool to drink and a washcloth soaked in cold water if desired.
The ideal time to clean a tub is immediately following a bath, but if it's been a while, you want to make sure you won't be bathing with any dirt or mildew. Spray your tub with a mixture of 1/2 warm water and 1/2 white vinegar. Allow the solution to stand for 15 minutes, then wipe with a cloth or sponge. Rinse with clean water, then wipe again. Alternatively, you can use a purpose made bathroom cleaning product, wipes and sprays are available. You may have to flip a lever near the faucet, or you may have a rubber stopper or bath plug that blocks the drain. If you're not sure if your plug is working, fill the bath with just a little water. The water level won't change if your plug is effective. If your plug is broken, missing, or ineffective, you can make a temporary stopper so you can still enjoy your bath: Use a flat rubber jar gripper--the thing you use to help open stubborn lids--and lay it over the drain. Wet a large hand towel and twist it, stuffing it into the drain. Just don't push it down too far. Place an unused single-cup coffee pod in the open drain. If it's a pop-up plug, get some plumber's putty and make a seal around the plug. While you may find a scalding bath relaxing, too-hot water actually agitates your nervous system and can cause a drop in your blood pressure. Your heart will start pumping harder, and you may feel dizzy or sick. On top of that, it can actually make it more difficult for you to relax and fall asleep after a hot bath. Use a thermometer if you want to ensure you don't run your bath too hot--this is especially important if you are pregnant. Remember that once you step into the tub, the water level will rise. If you fill it to the very top, water is going to spill over the sides and create a spillage and water could go everywhere. Place a bath mat or towel on the floor to catch any water that might slosh out while you bathe or drip off your body when you get out. This will help prevent you from slipping and falling when you step out of the bath. As you soak in the warm water, your body will start to try cooling you down by sweating. You can quickly become dehydrated, so make sure you are replacing those fluids by drinking plenty of water. Applying a cold washcloth to your forehead can keep you from overheating. Drink lemon or cucumber water and skip the diuretics (like soda, coffee, alcohol, or caffeinated tea), as these will further dehydrate your body if liked. If you find you get a headache after a bath, drinking water and releasing heat by cooling your forehead, hands, or feet should help.