Hello Richard Hulbert,

Get out the owner's MANUAL... and do the
FREE maintenance... (10000, immediately below)
Janome Memory Craft 10000 General Information Manual Page 72

Your machine: 11000
"Lint has collected in the bobbin holder"

Free:
Janome Sewing Machine Getting Started Manual Care And Maintenance

As I read YOUR manual... I see absolutely
NOTHING ON OIL (incredible to me).

One thing I do remember from the middle of the
last century... as my mother spent MANY HOURS
making the majority of our clothes... patching, altering
and YES... even those feed sacks (chickens & goats
(mostly))... MASTERFULLY designing & executing
her own designs... Tailoring second hand suits to
fit my father's big broad shoulders.

Was the EVER PRESENT Sewing Machine OIL
(Singer... actually)

JANOME: Awesome machine...
Thank you for the opportunity to experience
modern sewing... Pretty impressive.

Troubles & suggestions are on about page 104
of YOUR manual... 2nd ISSUE on the
trouble shooting list... "thread breaks..."

I know I am a bit old fashioned,,, but I always
recommend reading THE BOOKS before
stabbing at SOLUTIONS...

(in my less than humble opinion (all of this))...

If you do decide to oil anything COMMENT ME back:
I will point you to a modern synthetic that is
VASTLY superior to that gluey old "3 in 1 oil"

or look for "Liberty" synthetic on AMAZON.
(I use sparingly on tape transports & clocks
(& my Schrade & Old Timer lock blades too...
(those blades pivot smoother than a SENATOR
in a lite lobby breeze)))...

I am just saying...

Stay sharp!

Carnac the Magnificent

Also, install a brand new needle that is compatible with the thread and fabric you are using. Old needles become dull, bent, or damaged that affect the way the machine operates.

If you are using the thread that came with the machine get new thread as old thread breaks easily