A few weeks into Invisalign. I’m on aligner 5 (of 40!) both top and bottom. I’ve had one tooth removed as not enough room otherwise. I’ve had IPR too to help bring the teeth together even better. First few aligners I wore for between 2 & 4 weeks each, but I’m now on weekly changes.
I drink —a lot— of tea and keep mine in, it’s really not a problem. You’d have to have scalding drinks to damage the plastic! On weekly changes there is very minimal staining, on longer wear with the first 3 trays there was a little staining but I use Boots own brand Smile denture cleansing tablets which are about £1 for 30 and they’re great for keeping them clean and stain free (plus a little gentle brushing with a soft tooth brush).
My ortho recommended only using the chewie to ‘seat’ the aligner - I.e. when you put them in chew on it on each section of teeth to push the aligner on firmly, none of this hour’s worth of chewing (what good is that supposed to do other than make you sore?? although that advice pops up a lot on the mainly American FB forum I follow).
Take trays out to eat and ideally brush your teeth before putting them back in. If you can’t brush then at least rinse your mouth with water. Also if you do drink anything other than water with them in, then again rinse your mouth with water and swish it about to flush out the trays.
I do get a sore mouth with each new tray, they can have quite sharp edges so I sit and file each tray before I put them in and often revisit sections over a couple of days with the nail file. Dental wax is useful too. And Iglu on the sore bits of your mouth overnight works wonders.
Yes it’s a bit of a faff but no one has even noticed mine unless I’ve pointed it out, and nothing is easy if it’s worth having.
A friend of mine is almost finished and his teeth look amazing! Go for it OP!!!