[Machine] I heard a woman asking the Messenger of Allah ﷺ how she should deal with her garment after becoming pure from her menses. He said, "If she sees any blood on it, she should rub it and then rinse it with water, then sprinkle water on the rest of her garment and then pray in it."  

سَمِعْتُ امْرَأَةً تَسْأَلُ رَسُولَ اللهِ ﷺ كَيْفَ تَصَنَعُ بِثَوْبِهَا إِذَا طَهُرَتْ مِنْ حَيْضَتِهَا فَقَالَ إِنْ رَأَتْ فِيهِ دَمًا حَتَّتْهُ ثُمَّ قَرَصَتْهُ بِالْمَاءِ ثُمَّ تَنْضَحُ فِي سَائِرِ ثَوْبِهَا ثُمَّ تُصَلِّي فِيهِ  

Whenever anyone of us got her menses, she, on becoming clean, used to take hold of the blood spot and rub the blood off her garment, and pour water over it and wash that portion thoroughly and sprinkle water over the rest of the garment. After that she would pray in (with) it. (Using translation from Bukhārī 308)   

كَانَتْ إِحْدَانَا تَحِيضُ ثُمَّ تَقْرُصُ الدَّمَ مِنْ ثَوْبِهَا عِنْدَ طُهْرِهَا فَتَغْسِلُهُ وَتَنْضَحُ عَلَى سَائِرِهِ ثُمَّ تُصَلِّي فِيهِ