Problem: How to clean cultured marble
Dampen a clean rag with white vinegar.
Your rag should be wet through with white vinegar, but excess vinegar should not drip or seep from the rag. Either pour vinegar onto your rag in a sink or dunk your rag in vinegar in a bucket.

Answer: Wring out the rag lightly over a sink. Too much white vinegar can cause this liquid to spread to areas of the marble that are already clean.

Problem: How to design a dog agility course
Evaluate your dog's capability.
As you start thinking about what obstacles you want to set up in your course, consider your dog's capability. Make sure plan obstacles that are appropriate for your dog's size.

Answer: A corgi, for example, could not get through a tire jump meant for a german shepherd. Also consider any limited ability your dog has.

Problem: How to prune oregano
Wait until your plant is at least 4 inches (10 cm) tall.
Trimming the plant too early could cause your plant to fail to thrive, so be patient. Luckily, oregano usually grows quickly.
Answer: Pruning your oregano will encourage new growth. Not only will it grow more leaves, it'll even grow more stems! Cut back no more than 1/3rd of the plant at a time.