<prompt> Translate the following text to EnglishAlisafisha kichwa chake kisichotunzwa kwa nguvu na kuruhusu mwenyewe kusahau wasiwasi wote, kufurahia furaha ya kuwa safi kabisa tena.  <response>: He shampooed his unkempt head vigorously and allowed himself to forget all worries, wallowing in the sheer joy of being really clean again. 