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Use sodium bicarbonate. To translate that to English use 'Baking Soda'. Sodium bicarbonate is the main ingredient for baking soda and it has this magical effect on bacteria. Specially the ones that live in humid areas. Just put some sodium bicarbonate inside your backpack where it gets humid and leave it overnight then remove it in the morning and NO brave bacteria would dare to live there.
By the way you can use it on your shoes as well and it will eliminate the bad smell and its totally odorless and safe.

Use sodium bicarbonate. To translate that into English, use 'Baking Soda'. Sodium bicarbonate is the main ingredient for baking soda and it has this magical effect on bacteria, especially the ones that live in humid areas. Just put some sodium bicarbonate inside your backpack where it gets humid and leave it overnight, then remove it in the morning and NO brave bacteria would dare to live there.
By the way, you can use it on your shoes as well and it will eliminate the bad smell and it's totally odourless and safe.

Use sodium bicarbonate. To translate that to English use 'Baking Soda'. Sodium bicarbonate is the main ingredient for baking soda and it has this magical effect on bacteria. Specially the ones that live in humid areas. Just put some sodium bicarbonate inside your backpack where it gets humid and leave it overnight then remove it in the morning and NO brave bacteria would dare to live there.
By the way you can use it on your shoes as well and it will eliminate the bad smell and its totally odorless.

Use sodium bicarbonate. To translate that to English use 'Baking Soda'. Sodium bicarbonate is the main ingredient for baking soda and it has this magical effect on bacteria. Specially the ones that live in humid areas. Just put some sodium bicarbonate inside your backpack where it gets humid and leave it overnight then remove it in the morning and NO brave bacteria would dare to live there.
By the way you can use it on your shoes as well and it will eliminate the bad smell and its totally odorless and safe.

Use sodium bicarbonate. To translate that to English use 'Baking Soda'. Sodium bicarbonate is the main ingredient for baking soda and it has this magical effect on bacteria. Specially the ones that live in humid areas. Just put some sodium bicarbonate inside your backpack where it gets humid and leave it overnight then remove it in the morning and NO brave bacteria would dare to live there.
By the way you can use it on your shoes as well and it will inseminate the bad smell and its totally odorless.

Use sodium bicarbonate. To translate that to English use 'Baking Soda'. Sodium bicarbonate is the main ingredient for baking soda and it has this magical effect on bacteria. Specially the ones that live in humid areas. Just put some sodium bicarbonate inside your backpack where it gets humid and leave it overnight then remove it in the morning and NO brave bacteria would dare to live there.
By the way you can use it on your shoes as well and it will eliminate the bad smell and its totally odorless.