It's hard to clean up, because hair that's fallen out and the hair from the eyebrow extensions are lying everywhere on the floor.
"It's hard to clean up"＝「掃除が大変」
"because hair that's fallen out"＝「なぜかというと、抜けた髪」
"and the hair from the eyebrow extensions"＝「そしてマツエクの毛」
"are lying everywhere on the floor"＝「がそこら中、床の上に散らかっているから」
ご参考になると良いです！
アメリカ合衆国 
