How many times can you use the sponge that was used to apply liquid foundation?

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Question:
How many times can you use the sponge that was used to apply liquid foundation?
do you have to throw it out and get a new one after one time use?

Answer:
Dear sugarpopprincess,

The amount of times you can use the sponge depends on the brand, quality and how you apply the foundation.

Do note that foundation is wasted with the usage of sponge as the porous nature of the sponge absorbs the foundation into its structural material.

Use good structured foundation sponges.
I love sponges from Shu Uemura and MAC
1) Shu Uemura
http://www.shuuemura-usa.com/products/Pr...
2) MAC
http://www.maccosmetics.com/templates/pr...

Both sponges are great to use, firm to hold which will help to apply the liquid foundation easier.
Since both are of firm texture, it's easier to wash them and they don't disintegrate as quickly as the $2shop kind.

When to wash?
For general guideline:
Dry Skin - Wash your sponge once a week
Oil Skin - Wash them after 2 to 3 days

Tips to wash
1) Wash your sponge in normal tap water, allow parts of the foundation to be washed off
2) Use a bit of facial cleanser (smaller than a pea size) onto the sponge material and massage it into the sponge.
3) Moisten the sponge and bubbles should be produced. The bubbles will be of foundation colour.
4) Rinse the sponge and wash it clean til no more soap residual is left behind. (how to check? The sponge shouldn't foam as much)
5) If alot of foundation is left behind, repeat step 2 to 4.
6) When the sponge is clean, leave it at an airy place in your home to allow it to naturally dry out.
IF NOT, clip it on a hanger with a soft grip clip and air dry.

The TRICK is to AIR DRY, blowing it dry using a hair dryer or place it under sunlight will damage the sponge by disintegrating the sponge.

Normally I will suggest to liquid foundation user to use their fingers or a foundation brush. As fingers and brushes do not allow us to waste more on the skin. Fingers can be cleaned immediately, foundation brushes can be cleansed one every few days with a facial cleaner or a antiseptic body wash.