Bottles have a small amount of strange particulates (brownish blobs)

Hi all,

hope I can get away with an Apfelwein thread here.

This batch I made was the only one i've let clear for an extra two weeks (As I was on vacation). And it cleared like no other apfelwein ive made.

So after bottling and waiting another few weeks I tried it. Now the first couple of bottles I found this brownish reddish bugger looking things at the bottom of the bottles.

I thought maybe it was just bad cleaning by myself but after the 5th one I still find small amounts of this weird stuff in it. The apfelwein tastes great, no problem. But I can give this to friends if its got this in. How can I stop this in the future?

can you get a picture uploaded?
that may help get you an answer