Recessed valves

[oddbodrod]

My Delta is fitted with these recessed A7 valves, I presume the originals. I need some advise on how best to clean them. I don't want to replace them as I intend to have new tubes at the end of the year. Any advice would be great fully received, Thanks Rod.

[oddbodrod]

Can't load pics for some reason invalid file HELP!!!!!!!

[jeffstevens763@g]

does this help

https://www.ribstore.co.uk/pages/how...ld-a7-b7-valve

[oddbodrod]

Thanks Jeff