Loose dreadies

Hi guys. Ive had my dreads now for 9 months. I started them with backcombing and havnt touched them in 9 months..just seperate them every now and again. Ive noticed recently that some seem to be extremely loose halfway down, some have even split and it feels like there are no knots there at all anymore. could this be from overwashing (I wash around once a week) I'm just worried that they will completely unravel. its mostly dreads on the top of my head. The ones underneath at the back are nice and tight and quite loopy :D
updated by @jayde: 01/13/15 10:01:41PM

u cant over wash if anything your under washing but what are you washing with? that might be the cause

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My new book Ban The Taboo Vol 1

just an organic non residue shampoo i got in a health shop. could it be that i'm washing or drying them too roughly. i usually give them a good squeeze out after washing by grabbing and twisting a handful to squeeze the water out

Wash more often, like 3-4 times a week and dry them really well. You can soak your head in salt water a couple hours before showering. Make sure you use sea salt, not ordinary salt. Make sure you rinse thoroughly.

Just be patient. They'll lock up.

No need to worry about it, Tnr and backcomb dreads tend to unravel some and then relock naturaly. just let them be. Some Lockin' Up Liquid from the DLS site might help.

Thanks guys...great advice. Just gotta be patient i guess :D