Each of us (wives of the Prophet) had only one clothe in which she would menstruate. Whenever it was smeared with blood, she would moisten it with her saliva and scratch it with saliva.
عَائِشَةُ مَا كَانَ لإِحْدَانَا إِلاَّ ثَوْبٌ وَاحِدٌ تَحِيضُ فِيهِ فَإِنْ أَصَابَهُ شَىْءٌ مِنْ دَمٍ بَلَّتْهُ بِرِيقِهَا ثُمَّ قَصَعَتْهُ بِرِيقِهَا