A complete cleaning involves discarding all of the used bedding, not merely "spot cleaning" the dirty spots.  After removing the old bedding, wash the bottom and sides of the cage with soap and water, rinse thoroughly, then place fresh, new bedding in the cage. After washing with soap and water, you can use a 10% white vinegar and water solution (1 part vinegar to 9 parts water) as a rinse before drying the cage bottom.  Using the vinegar solution once a week (each time you fully clean the cage) may help eliminate odors and remove buildup that water can't.. Particularly if you have multiple guinea pigs in one cage, you should clean out parts of the cage daily in addition to the once-a-week deep cleaning.  To spot-clean, remove and discard any areas of soiled bedding at the end of the day. Most guinea pigs will use one part of their cage as a toilet area; cleaning the toilet area daily will help with odor and cleanliness. .  Spot cleaning will become easier if you can train your guinea pigs to use a litter box.  Identify the area that your guinea pigs tend to use as a toilet area. Then place a litter box made for small mammals in that corner of the cage.  Your guinea pigs will be more likely to use the litter box if you put it near their hay. Guinea pigs usually have a "kitchen" area where they eat and poop a lot. However, don't expect them to always use it; guinea pigs can't be perfectly litter trained like cats. If they change the area in which they use the toilet, try moving the litter box to the new area. Clean out the litter box every 1-3 days depending on how much it is used. Never place clumping cat litter in a guinea pig's litter box.  Guinea pig-safe bedding material is the most appropriate option. Cleaning sprays specifically formulated for small animal cages can help minimize cage odors.  Check your local pet store for products that are safe and effective for guinea pigs. Make sure you use only as much as the label recommends.  To use a cage-cleaning spray, remove all used bedding from the cage.  Spray the tray of the cage liberally with the cage cleaner. Allow the cage cleaner to soak into the cage for 3-5 minutes. Use a rough towel to wipe away cage cleaner and loosened debris from the bottom of the cage. Allow the cage to dry completely (in the sun if possible), place fresh bedding in the bottom of the cage, and return your guinea pigs to their home. You may want to continue using soap and water to clean the cage in addition to the cage cleaner. Bedding formulated to block odors, such as Carefresh, can keep the cage smelling fresh longer.  Place 1-3 inches of bedding in the bottom of your guinea pigs' cage.  Be sure to scoop out wet or soiled bedding daily.  Though odor-blocking bedding can make the guinea pigs’ cage smell better, you should still clean the cage well and completely replace the bedding at least once every week. Baking soda is marketed as odor-controlling, but it can cause irritation and should not be used.
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One-sentence summary -- Clean your guinea pig's cage at least once every week. Spot-clean your guinea pig's cage daily. Litter-train your guinea pigs Use a cage cleaning spray. Use odor control bedding.

Article: To repair your bumper, you will need fiberglass resin, fiberglass matting strips, and a liquid hardening agent, along with plastic or wooden sticks to help mix the resin and a brush or other applicator to put it on the bumper. You can purchase these separately or in pre-packaged fiberglass repair kits. Look for the materials at auto supply stores. Grab your cloth matting and hold it up to a damaged area. Using a fabric marker, make a line on top of the cloth indicating the crack placement. Then, take your fabric to a solid working table and cut it using a precision knife. So you have enough overlap to support the fiberglass, leave about 20 mm (0.79 in) of space around the marked area. Repeat this with each crack. Grab a small container and pour in the amount of resin you think you’ll need to cover a specific piece of fiberglass matting. Then, check the instructions on the back of your resin container and apply the recommended amount of hardening agent. Using a plastic or wooden stick, stir the substances together until they are well mixed. Once combined, most resin mixes stay soft for 8 to 12 minutes, after which they become unusable. Cover the back of a damaged area with a sheet of fiberglass matting. Using a brush or other applicator, cover the entirety of the cloth and about 2.5 inches (6.4 cm) of the surrounding area with the resin mix. Repeat this with each crack, then let the matting cure in a moderately warm area for about 2 hours. For extremely large cracks, you may need to apply matting to the front of the bumper as well.
Question: What is a summary of what this article is about?
Purchase resin, hardener, and cloth matting strips. Cut the fiberglass matting to the size of each cracked area. Mix the resin and hardener together. Apply the matting to your bumper using the resin mix.