i can not get my blood to swab in level 8 please help me

I just saw this, been very busy. If you are still stuck or if anyone else needs help. You have to use the light on the blood before you swab. Just use the swab/kit and click it on the blood like in other various levels. I hope this helps.

I did that and it didnt work!

'Majormysterygamer'

The blood is on the desk.If you put the light on it it sparkles.Click.Put your light on again and some green stuff will sappear swab THAT.

'Majormysterygamer'

I'm having the same problem. I keep putting the light on the blood, then I try to swab, it's not working.