Wilted leaves, new growth

[nikkib783]

i have two phalaenopsis orchids that the flowers wilted and the spikes turned brown so i trimmed them back a couple of months ago.
one of them looked pretty bad so i didn't hold much hope for it so i didn't pay as much attention to it (which now thinking about it is a bit backwards) but i watered it every now and then. it now has four new spikes growing, which i didn't expect, there is also new leaf growth which is amazing, but the lower leaves are wilting and one is now yellow. some of the top roots also look a bit dry and dead.
what would you recommend my next step is with this plant (first picture).
the other looked healthy the roots looked healthy and so do the leaves, a new leaf has come out but i haven't got any new spikes, but the top roots do look a bit crowded, and the previous spike that i cut back is now turning yellowy brown? what should my next step be for this one (second picture)
they are both now watered, let to drain then put back in pots in kitchen widow (no direct sunlight), then i let them dry out completely and then i water them again

any help would be much appreciated as these are my first orchids.
many thanks
nikki

[King_of_orchid_growing:)]

1. Your Phal needs to be repotted. Increase pot size only by one or two subsequent pot sizes, do not go overboard and repot into a pot that is significantly larger than the root mass.

2. Please read the sticky "The Phal abuse ends here." starting from the very beginning, for some basics on Phal physiology and ecology.

[nikkib783]

brilliant thank you, i have reached page 15 so far

the orchid in the first pic is in a 12cm pot and the orchid in the second picture is in a 11cm pot, what size pots do you recommend i go up to?

thanks again

[King_of_orchid_growing:)]

A 13 cm - 14 cm pot for one of them and 12 cm - 13 cm pot for the other one, respectively.