Store condoms in a cool, dry place. Condoms may be damaged if left in the glove compartment of a car or carried in a hip wallet for long periods. Cover the head of the penis and unroll the condom so it covers the entire erect penis. Add water-based lubricant if desired. Do not use oil-based lubricant such as petroleum jelly, baby oil or lotions.
Oil weakens the latex and can cause breakage.
After sex, remove the condom carefully, holding the rim. Don't let the penis go soft inside the partner, as the condom may drop off and all protection is lost. Don't allow semen to come in contact with your partner's genitals, skin break, cut, or open wound. Dispose of the condom safely. If used correctly every time you have sex, condoms are 90 to 95 percent effective for birth control.