Every home owner should be well familiar with caulking, and if you are not, now is the time to learn.
Caulking is used all over your house, and especially in areas that are exposed to more water like bathrooms. There is a very, very good reason for this. The caulking provides a protective seal to keep water from getting behind your sink, bathtub, toilets and more. If water does get behind them, and into the drywall, that is when you get mold.
That is why you need to make sure you protective seal is secure at all times. If there are any cracks, or the caulking is completely gone, it is time to apply a fresh coat.
Novices may be scared by the caulking gun. It does take a little getting used to, and is very handy for large jobs. However, if you have just a small section that needs a touch up, they sell very small tubes of caulking at the store. These tubes require no caulking gun, and are much easier to use.
The caulking comes in many different colors. The two most popular are clear and white. If you use clear when you should be using white it will look very goofy. Clear caulking is not meant to be seen, and white caulking provides a nice border around your fixtures. For the white there are different varieties that dictate how shinny it is, and is only a matter of taste for which one you choose.
Take off all of the old caulking before applying the new caulking, and make sure the area is clean and dry. The best method to remove old caulking is to remove it with a flat razor blade. The #1 rule of home improvement, is to always have a lot of sharp razor blades on hand. Buy razor blades in bulk, and throw them away as soon as they even start to get dull.
Once all of the old caulking is removed, you can apply the new caulking. Apply the caulking in a straight line. The next step is very messy, but well worth it. Wet your finger, and smooth the caulking out to a nice shape (with one finger). Have plenty of paper towels on hand to clean any messes.
Give the caulking plenty of time to completely dry. Once your finished you will realize how easy it is to do. It is a little messy, but you just helped protect your home from mold, and probably spent less than 10 minutes doing it. Well done.