On Sunday, 3 February 2019 20:40:28 UTC, Another John wrote:
Has anyone acquired / had a go with one of these-type things?

https://tinyurl.com/yaluraxv

(That's a 232-character URL at Amazon, reduced by TinyURL.)


Background: we have a small woodstove, connected to a traditional 60s
semi's fireplace, chimney pronounced fit for use by the stove fitter,
i.e. no stove liner.

Cheers
John

What you need is a good blaze once a week.
Get a good fire going and then put some newspaper in on top.
Burns the tars off of the chimney.
If your liner has no insulation between it and the masonry, you will always have problems.

Don't do this if you have a big tar accumulation, you could have a major fire.
It needs doing regularly to stop big build ups.

These crinkly liners are a major problem.