You sprayed PEROXIDE on the plants! There's yer spots dude!
Peroxide- even diluted with water- would burn the plants if mixed at a high enough rate to kill bugs!
Use either NEEM with a few drops of dish soap so it stays mixed, Mity Wash (Ionized water- the lil bastards literally explode on contact and it leaves no residue!) Seirra Natural Systems Mite spray (all organic - works well) or Azamax (all organic- but hard core... use the mix suggested for berries)
You CAN bomb the room- IF you use only a pyrethrin fogger... they are made from chrysanthremums and work well... but you STILL need to keep cleaning and mopping the room weekly with bleach water.
once mites are in a room- it is damned near impossible to EVER be totally rid of them, short of removing EVERY plant from the room and doing a hard-core Bug Bomb And spraying the plants with Azamax or one of the other sprays while you wait. Make sure you spray the planters and surface of the soil... they lay eggs there too!!!
We also fight the battle of the Mites-- am in the lead, but we live where there is a lot of "Monsanto" type crap being sprayed- so anyone not using chemicals gets hit hard, and the bugs are more resistant due to repeated exposure over generations...
Good Luck!