A Mu‘takif can let his head in the house for washing

Narrated 'Urwa:

Aisha during her menses used to comb and oil the hair of the Prophet while he used to be in Itikaf in the mosque. He would stretch out his head towards her while she was in her chamber.

حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مُحَمَّدٍ، حَدَّثَنَا هِشَامٌ، أَخْبَرَنَا مَعْمَرٌ، عَنِ الزُّهْرِيِّ، عَنْ عُرْوَةَ، عَنْ عَائِشَةَ ـ رضى الله عنها ـ أَنَّهَا كَانَتْ تُرَجِّلُ النَّبِيَّ ﷺ وَهِيَ حَائِضٌ وَهْوَ مُعْتَكِفٌ فِي الْمَسْجِدِ وَهْىَ فِي حُجْرَتِهَا، يُنَاوِلُهَا رَأْسَهُ.