Ermm younger I think, 35 ? what upholstery chemical have you found best? Il give it a try..
any good micro splitter on most suites should do the trick, i use split x from cleansmart but most good suppliers will have a decent enough micro splitter, (don't believe the hype there all good
) i mix mine quite heavy though, don't eff about with 1 to 120 or whatever it is. about 1 to 8 for me. spray on, give it a tickle, acid rinse extract, usually do all the base cushions first (which gives you some dwell time)then get them stacked up with a blower on em then do the back cushions and the dirty bits on carcus, then finish with just rinsing anything that aint dirty. if cushions or arms don't quite cut the mustard i hit with either citra boost or citra concentrate,(the latter being good on dye transfer) very rare that i need anymore than microsplitter though. hope thios helps, maybe give it a go sometime.