I let my phals develop their spikes without staking.
The only time I stake them is when a few flowers open and the weight of them seem too much on the spike to hold up.
If you are a windowsill grower like me, turning the pot every so often as recommended by someone above, helps the growing spike stay straight up.
Regarding the tie, my favorite is thread (yarn).
I buy one head ( what is the counting unit for this thing??) of small yarn for $1 at a dollar store. Very cheap and long lasting, and it comes in many different colors.
It is so soft that you don't have to worry about scratching the spikes or buds. Very flexible (more than any ties out there, dud, it is thread!) which makes it so easy to work with.
In case the spike doe bend somewhat and you want it as straight up as possible, do not apply to much force as doing so might just break the spike.
You want to inset a long skewer of any type you can find that is at lest one foot tall right along the spike. Closer the better.
Gently tie the spike near the tip ( I would say at least an inch or two below the growing tip, which is very tender) and bring it in closer to the stake, but be very careful and very very slow when doing this to prevent any damage. Do not attempt to pull the spike all the way to the stake, but just shoot for about 70% or so of what you think would be ideal distance. This is not necessary but safe and works for me.
Then you can pull the spike further in after about one week when the spike has grown taller and the part you tied has become a bit stronger and harder.
Try one more as the spike grows taller and still crook.