Patio Doors - clever ideas/help?

[greenwoo]

Before I turn the worldwide web upside down....has anything comes across anything that can be laid in the bottom tracks of UPVC patio doors, to aid cleaning?

Thinking that there must surely be something sold for purpose which slots down and can be pulled up dusted off and put back, rather than sodding around with a cloth etc.

[Larkingabout]

Get one of those kitchen sponges with the scourer on the back. Place over the track and mark the ridges. Partly slice the sponge on the marks and hey presto you can clean along the bottom in one sweep. Works for me at work and a cheap solution.