Rolls Rapide: I know in UK Bounce switched to the name of Lenor but does still exist, many on ebay.
Said this, my family always used dryer sheets, I'm 23 years old and since I can remember our dryers always ran great and absolutely no residues from them, we mostly used Bounce but never missed generic brands as well at times...
I continuosly using dryer sheets and sometimes even 2 or 3 sheets per load with certain brands... and here not, no residues at all, vent takes a clean and check after 2 years or so and what we always find it's nothing than a normal very, very thin dust/lint build up.....
Filter is always like new as well.......
I mostly use dryer sheets because IMO they softens best and laundry get more scent, I never experienced partial softening also.... Just once a brand I can't recall used to leave stains and strips to dark clothes and didn't soften well, I discovered then it was a brand "made in china" who knows what they did put in! I got it on ebay! I can't recall the brand...
I also use liquid softeners at times but I prefer dryer sheets.....
Now, looks like some people gets a build up and residues others not...me absolutely not.....I can't really figure out why, some people also talks/warn and quit just because they heard of it from others even if never experienced it themselves, anyway it's a rumour that goes along since they came out, I've read that many people/repair man etc. also give the fault to them for dryer fires and say they can cause dryer fires due to lint build up, you know what I think? Bullshits! I think primar cause of dryer fires is the negligence of owners not cleaning vent on a regualr basis! Anyway with me never a problem......just get out of china shit ones, Lenor dryer sheets in UK are the exact thing of Bounce, they're made in Canada too like most (almost all) of P&G's dryer sheets....
But they changed bounce and they're not like before, the ones I like and buy mostly are: Gain, Kirkland, Suavitel, Downy, Snuggle...