How to Make Your Toilet Always Smell Good. Ideal for Visitors to Use

Here are the materials needed to make them:
A cup of baking soda
1/4 cup of citric acid
A bowl
A spoon
A tablespoon of dishwasher detergent
An ice bucket
You just need to follow these steps:

Mix the baking soda and citric acid in a bowl or bowl
Slowly add the dishwasher detergent until the mixture is sandy.
Put the mixture in an ice bucket, forming very compact cubes.
Let dry for at least four hours
Remove the cubes and store them in a container that protects them from humidity.
To use them, pour them into the cup until it stops bubbling.